The creators have to pay 19,99 dollars to enter in podcast of payment, and Apple will take 30% the first year, and 15% from the second, and has not said anything of how much will have to pay the user...
What will encourage those who are in Patreon (I do not know how it goes) or for example Ivoox, here in Spain, where many have to each person could donate between 1 and 10 euros voluntarily each month and goes directly to the creators , (obviating the 10 euros per month of subscription to IVoox and already distributed by them) to leave there and choose Apple Podcast? that incidentally, I do not know if this app for android, so they lose audience reach too.
Not counting similar platforms like Ivoox in other European countries, This Apple Podcast subscription might make sense in the USA, UK, Canada or Australia, but in other European countries, I don't know how they will fare.