This episode breaks down Block (formerly Square), the payments company behind Square and Cash App. The guest argues Block's real edge isn't tech but a 'trust first, verify second' approach that lets merchants start accepting payments instantly, unlike traditional banks. He's bullish on Block's dual ecosystem: Square for merchants and Cash App for consumers, which together can form a closed-loop network like American Express, boosting profit margins. Key holdings: Block (SQ) is a buy, with gross profit growing from $500M to $5B in a decade; Cash App acquires users for just $5-10 each, vs. hundreds for banks; Afterpay generates 1 million daily merchant leads, linking the two ecosystems.
Block (formerly Square) was founded in 2009 by Jack Dorsey and Jim McKelvey, with a current market capitalization of approximately $75 billion. The company operates six major businesses: Square, Cash App, Afterpay, Tidal, Spiral, and TBD, with a core mission of promoting economic access and empowerm
Guest Hamish Corlett (payments specialist at TDM Growth Partners) deconstructs how Block (formerly Square) evolved from a 2009 card reader into a financial services and software enterprise with a $75 billion market cap. Core thesis: Block's true moat is not payment technology, but its data capability built on "trust first, verification second" and the emerging two-sided network effects between its dual ecosystems (Square merchant side + Cash App consumer side)—this is the fundamental differentiator from traditional financial institutions and pure payment companies.
Hamish Corlett points out that the core innovation of Block's merchant business (Square) is not hardware, but a complete disruption of the traditional financial service customer onboarding process. The traditional banking approach is "verify first, then trust" — applying for a merchant account requires 3-5 weeks of approval, with only a 40% pass rate. Square's approach is "trust first, then verify" — leveraging data and AI capabilities to monitor fraud in real time, enabling instant activation for 99% of merchants.
> "Their approach was trust first, verify second, whereas the traditional financial institution approach is verify first, and then maybe we'll think about trusting them."
This capability allows Square to extend upward from payment processing (low gross margin of ~33%) to software (gross margin of ~80%) and financial services (loans, Square Card, instant transfers). Key data: Merchants using multiple products generate several times the unit gross profit of those using only payment services; the Square merchant ecosystem has a payback period of 18 months and an ROI of 3x.
Cash App started as a 2013 hackathon project. At the time, Venmo was already sizable, and internal opposition argued that "P2P payments don't make money." However, the team seized the opportunity presented by the approximately 60 million unbanked individuals in the U.S., echoing the story of Square's merchant side — starting with a minimalist product and gradually adding features.
Key data: Cash App's customer acquisition cost is only $5–10 (compared to hundreds of dollars for traditional financial institutions); user payback period is <12 months; ROI for users with over 3 years of tenure is 6x; net gross profit retention rate for the user base is 125%. Cash Card (Visa debit card) users generate 5x the gross profit of pure P2P users.
> "Cash App has really become a part of the culture for Gen Z and millennials. Cash App is now in one or 2,000 song lyrics."
Afterpay's "buy now, pay later" model creates what Hamish describes as "one of the strongest bilateral network effects I've seen in my investment career" — it operates at the transaction level, providing merchants with transaction-level data and potential customer generation. For Block, the strategic value of Afterpay lies in:
1. Merchant Discovery: Afterpay delivers 1 million potential customer leads to merchants daily (based on 16 million annual active users). Integrating this into Cash App (approximately 100 million annual active users) could generate over 2 billion potential leads annually. At an average order value of $50–100, this corresponds to a $100–200 billion GMV opportunity.
2. The Economics of a Closed-Loop Network: Within the closed-loop transactions of Square merchants + Cash App consumers, Block's net take rate rises from approximately 1% to around 3% (as it avoids interchange fees paid to card networks and issuing banks). This mirrors Amex's closed-loop model — acting as both the acquirer and the issuer.
> "That's why Amex has been able to offer the best rewards because they've got a closed loop system. They're both the acquirer and the issuer. That's essentially the roadmap for Block."
Hamish argues that the moat of traditional financial institutions lies in scale and trust, and Block is eroding both simultaneously. Square started with "micro-merchants that big banks didn't want" and has since moved upmarket to mid-sized and large merchants, maintaining its fee levels during this upward migration (without resorting to a "race to the bottom"). In the P2P space, Cash App has surpassed Venmo, and the gap is widening.
Key comparison: Square's merchant ecosystem GMV stands at approximately $200 billion; JP Morgan has 71 million retail card users and 4 million corporate clients; Bank of America has over 40 million digital consumer and small business banking customers—Block's scale is now comparable to that of major banks.
Hamish clearly states that Block's biggest risk is damaged trust—whether on the merchant or consumer side. The second risk is increased regulatory burden as scale grows (Block has obtained an FDIC bank charter), which could slow innovation and alter the corporate culture. Regarding the Bitcoin strategy, he believes the current financial risk is limited (related spending accounts for less than 2% of OPEX), but the degree of management attention and brand positioning "bet" far exceeds the financial figures.
| Position | Guest Stance | Key Data |
|---|---|---|
| Block (SQ) | Bullish | Market cap $75 billion; gross profit grew from $500 million to $5 billion (CAGR ~50%); Square merchants ~3 million; Cash App annual active users ~100 million |
| Square (Merchant Ecosystem) | Bullish | Gross profit $2.3 billion; net take rate ~1% (closed-loop can reach 3%); payback period 18 months; ROI 3x |
| Cash App (Consumer Ecosystem) | Bullish | Customer acquisition cost $5-10 (traditional banks hundreds of dollars); payback period <12 months; ROI 6x; user retention rate 125% |
| Afterpay | Bullish (Strategic Value) | Annual active users 16 million; merchants over 100,000; provides 1 million leads daily; average order value $50-100 |
| Tidal | Neutral to Positive | Acquisition price several hundred million dollars; viewed as a long-term experiment treating "artists as small businesses" |
| Venmo (PayPal) | Neutral (Competition) | Former P2P leader, now surpassed by Cash App |
| Toast | Neutral (Competitive Reference) | Restaurant SaaS competitor; net take rate ~1% |
| Amex | Positive (Model Benchmark) | Closed-loop system benchmark; acts as both acquirer and issuer |
1. "Trust first, verify second" is the core mechanism by which Block disrupts traditional finance — traditional banks take 3-5 weeks for approval with a 40% pass rate; Square activates 99% of merchants instantly, replacing pre-approval with real-time data monitoring.
2. The economic advantage of the closed-loop network is a digital replay of the Amex model — in closed-loop transactions between Square merchants and Cash App consumers, Block's net take rate rises from 1% to 3%, as it avoids paying interchange fees to card networks and issuing banks.
3. Cash App's customer acquisition cost ($5-10) is 1/100th that of traditional banks — traditional financial institutions spend hundreds of dollars per customer, while Cash App achieves viral growth through cultural marketing (lyric placements, celebrity partnerships, streetwear lines).
4. The core value of the Afterpay acquisition is not the BNPL product itself, but the "merchant discovery" feature — with 1 million daily leads, integrating this into Cash App could generate over 2 billion leads annually, corresponding to a $100-200 billion GMV opportunity.
5. "TAM is not credible; innovation is the determining factor for growth" — Hamish argues that in a large market like financial services, the real opportunity comes from deep understanding of customer pain points and continuous innovation, not market size estimates.
6. Block's biggest risk is not regulation, but the erosion of trust — merchants and consumers rely on Block to run their daily operations and manage funds; once trust is damaged, the entire ecosystem could collapse.
7. The financial risk of the Bitcoin strategy is limited (OPEX share <2%), but the "bet" on management attention far exceeds the financial numbers — the Spiral team works entirely on Bitcoin open-source projects, receives no Block stock, and has no direct economic interest, reflecting a "mission-driven" rather than commercial-return approach.
8. Square has maintained its take rate while moving upmarket, which is proof of its product capability — the traditional acquiring industry is a "race to the bottom," but Square creates higher value for merchants by layering on more products (loans, cards, instant transfers), thereby sustaining pricing power.