I promote my videos solely from this highly-moderated mastodon server with the expectation that at least this way I won't cultivate a shitty starter fanbase. Which makes sense for me as the Patreon doesn't bring in enough money yet to matter. Even if it started to though, I would be very hesitant to offer any kind of less-moderated 'fan space' on another site or service. Judging from observations, that usually goes very badly.