People are pretty fond of the grassroots movement for independent creators to strike their own on reddit. Onlyfans is a good website for creators to monetize their content, but I don't believe it does much for growing their following. Pornhub has gotten better for smaller creators but so many things are lost in their terrible tagging and indexing that they're lost in the flood.

Topical community environments like reddit on the other hand let's them show their specific content to a group that's primed to like it. Mods are keeping the focus narrowed, so you're less likely to compete against the same reposted clip from a decade ago that has little connection to the tags affixed. Pretty similar reasons for why it did so well on Tumblr as well.