$138 is unreasonable to me for one simple reason: When I pledge to 20 creators, Patreon batches my pledges based on arbitrary server-side criteria, such that they cannot guarantee how many charges will be made to cover my pledges.

So typically I see two charges per month. They can't charge me $0.35 per charge because the # of charges varies without any ability for the customer to predict and cannot be defended reasonably to customers.

Instead of revamping their billing groupings to ensure that each patron is charged once per month, they are charging $0.35 per creator, which is the absolute worst case scenario here.

So to me, the ripoff is that they charge me for two credit card transactions, but instead of $0.35 per transaction, they charge $0.35 per creator within a single credit transaction - when that $0.35 is not charged to them by their merchant processor for those individual creators.

I would have been fine if they'd simply tell me "X creators = Y transactions @ $0.35 each + 2.9% of amount", where Y is virtually always some tiny fraction of X, but that they instead say "X creators = X transactions @ $0.35 each + 2.9% of amount" to avoid regrouping their billing is a misuse of the word 'transaction' as they implement it.

EDIT: If Patreon has been charging $0.35 per patreon to their creators, then this is not new profit for them, but is instead the same profit now collected from patreons instead of creators. It's still unacceptable to me, because they're charging the worst-case scenario (one transaction, per patreon, per creator) and then optimizing for less than that and not crediting the excess (Y-X) x $0.35 back somehow. If their 5% take isn't enough to cover transaction costs, hiding a profit in (Y-X) x $0.35 is not the correct way to solve that.

EDIT: It's possible that Patreon was censured by Stripe somehow and is going to stop batching charges period full stop come January, and so then Y=X for all cases, at which point this all starts to make a lot more sense.