Could you reconsider BTC because of this whole USA tariffs situation? At least as a payout method. I don’t know if/how exactly this will affect devs outside USA, but it’s unfair to have small indies be punished because of their countries’ policies, which they can’t control.
Another option is “stablecoins” like USDT/USDC/DAI to have consistent USD prices, but still avoid expensive fees on payouts.
If currency conversion creates complications, you could at least let customers pay in Bitcoin, in which case publishers receive in Bitcoin directly (no USD conversion). Similar to “Direct to you” mode. Allowing BTC transactions that integrate with itch’s download keys system would greatly help. Even better if we can allow discounts for customers who pay in BTC. Lightning Network can be used for instant BTC payments, so no 10 minute wait, and no expensive network fees. You could implement it in a way that’s independent from 3rd party services (except for USD->BTC price API).