This comparison with Luxotica breaks down for two reasons. First is when you consider that Paypal has network effects and iOS and Android are platforms. Pushin

This comparison with Luxotica breaks down for two reasons. First is when you consider that Paypal has network effects and iOS and Android are platforms. Pushing glasses frames has neither of these impediments for upstarts. The second is the ridiculous markup. If Paypal increased their transaction fee from 3% to 30%, a competitor would kill them. Cargill didn't bump food prices 10-fold even though bio-engineering is at least an order of magnitude more complex and costly than molded plastic in a pretty shape.