"pete buttigieg is just a faggot" applies to abdl too. if you're not concerned about this i recommend changing your mind before it's your turn.
first hypno, now ABDL. Patreon can't just go after all kink or all adult work in general right NOW because they know we'll pitch a fit about it-- we have in the past, we can again. but if they keep trimming around the edges and shrinking the circle of What's Acceptable, then eventually they can lessen the impact when they do enact a blanket ban on NSFW stuff. or they can just keep a very, very narrow vanilla definition of sexual content on their site so they can SAY that they still welcome adult work, technically.
it consistently drives me nuts that so many sites and services online build momentum through providing a service to adult content creators, but then treat those creators like garbage whenever they need to look "respectable", to investors or CC processors or whoever. this attitude creates a weird dichotomy where porn is seen as this easy industry to get ahead in-- everyone wants it! it's easy to make! and it's disposable, so there's no need to try and make it good!-- but it actually requires this crushing grindset mentality. you need to raise enough attention to get fans, but not SO much attention that the moderation team on whatever sites you're advertising on notices, all while constantly looking over your shoulder for the next tidal wave on the horizon.
the big reason i've continued to post my comics and art on Patreon is because of name recognition-- it's way easier to get people to sign up to your subscriber-only blog if they already have an account and they don't need to learn how to navigate a new website-- but if this is indicative of a trend, or even if enough people SEE it as a trend to start leaving en masse, i'll have to start exploring other options. it's annoying and it sucks, but it's The Business.
also this is why i pay $5 a month for Cohost Plus, because Cohost is kind to its pornographers 
ABDL folks, age players, babyfurs, and adult babies in general are cool and my friends and anyone going "ah well you know, patreon is only doing this because they have a good reason to" is both wrong, and a coward. They'll absolutely come for your niche freaky weird fetish next, I guarantee you.
D.Egg is absolutely right in that this is likely an attempt to make outright banning NSFW content on the platform more palatable by whittling it down bit by bit at first, under the guise of safety or whatever bullshit.
As someone who has a project in the works that is absolutely out-there kink wise, planned to go through patreon to financially support making it, I am worried both where this will lead and how it'll snowball, and, for fellow content creators who are ABDL who're now going to have to Once Again pack up shop and move elsewhere because some hoity toity shithead in a swivel chair gets icked by a kink they don't like and takes his soccer ball home so now no one can play.
Fuck, I hate the fact that so much creative content, especially queer, expressive, adult content, is only financially viable for creators at the whims of a bunch of dipshit weirdos. Weirdos who will, at the drop of a hat, decide that actually they're not making quite enough money to buy that second yacht this year so they better start throwing people they see as undesirable under the bus to make a platform more attractive to investment bellends and hedge fund wankers.
This Sucks.