DuckWorm said in another response the reason provided was incest, But what your saying happens far too much, the sad part is most of the Patreon takedowns happen due to someone else reporting it for Patreon to then go well we better take a look.
Honestly yeah its disappointing. Im glad its back up though while patreon is a pretty good platform it just seems to have WAY to many restrictions and most of them would be solved with a stealthy update that added an adult section like subscribestar does. Patreon already basically shadow bans adult accounts on their search function anyway.