Well, one advantage is that people that donate (such as me) like to have a single location to manage their subscriptions, see who they are donating to and what

Well, one advantage is that people that donate (such as me) like to have a single location to manage their subscriptions, see who they are donating to and what they are getting in return, and even discover new and interesting things that might be related. The last thing I want is to look through my CC transactions to be reminded who I'm donating to. I have foregone donating to a project because they didn't go to Patreon, because the extra hassle was enough that I didn't want to. They noted specifically why they weren't using Patreon even though they got constant requests, and their reasons have merit. But that decision also caused enough friction that I never donated, and I would have been happy to send them money monthly if I didn't feel like it was yet another random monthly transaction that I might forget about that I see years later and wonder why I've been paying.