Yiff actually went down several times because of sudden explosions of content when people started uploading youtubers and 3dpd content. We also know that the ban on it was effective purely on paper, the majority of those pages were never taken down once.
Besides, there are hundreds of options to getting normal porn and patreon leaks from mainstream e-celebs anyway. There are entire reddits, telegramm chats, discord servers, etc. with thousands of active users constantly posting, updating and re-uploading content through mega files and torrents. There are almost no places to get patreon stuff from furry artists: exhentai is more focused on anime and japanese artists and rarely do you get direct dumps from patreon (and the galleries are harder to navigate when you get to 300+ pictures), and on U18 actual leaks are extremely rare and much harder to find unless you're talking about a popufur artist. What's left? luscious.net and old forums where, after you register, you find out 90% of the links are broken, if they are even up to date by a margin of less than 3 years.