How much is each entity extracting from the suggested economy in terms of income.
PayPal operating income: $4 billion
Apple operating income: $114 billion
And of course PayPal is a skimmer, somewhat similar to Visa, so their extraction is miniscule compared to the transaction base. Apple carves out a fat profit from their ecosystem by comparison.
Maybe PayPal is beaten down here and their stock is relatively cheap as a value play. Or maybe they're about to be destroyed as the US switches to a European style, low cost insta money moving system courtesy of FedNow, and the market is pricing it accordingly. PayPal better diversify in a hurry, the transaction skimming business isn't going to be so nice in the future.
Meanwhile you have Epic offering to do the whole shebang for 10%, F-Droid doing it on Android for free apps for nothing, PayPal doing payment processing for a fraction of a percent over the credit card fees whereas Apple still wants 30% from in-app purchases that don't even use their hosting or tools. Makes it pretty clear that 30% is the monopolist lock-in price and not the free market price.