When you use Apple Pay, Apple collects ~0.15% (15 bps) from the issuing banks for credit. $1B in transaction volume = $1.5M

In 2022 the total volume was estimated at $6T * .15% = $9B. Real number would be maybe half due to lower fees on debit, but it's hugely profitable for Apple, and carries zero risk.

They'd much rather have 30%.