A viral thread breaking down Visa and Mastercard's fee structure reminded the tech world how card networks really work. Between the 2% interchange fee sent to issuing banks, 0.35% kept by processors, and 0.15% skimmed by the network itself, every swipe is taxed by a chain of entrenched middlemen long before a business touches its revenue.
For early-stage founders, this structural toll is a constant squeeze on gross margins and runway. Operating on legacy payment rails means handing over a chunk of your top line to infrastructure whose maintenance costs are a fraction of what they extract. It underscores the urgent need for founders to build or adopt leaner, peer-to-peer transaction models that keep value with the creator and customer rather than legacy card rails.
For small backers investing from £500, the discussion offers a masterclass in business defensibility. Card networks have achieved the holy grail of venture scale: low-cost maintenance paired with unavoidable tollbooth power. When backing early-stage fintechs or marketplaces, look for teams attempting to either dismantle these expensive intermediaries or build defensible, high-margin networks of their own.