It has been tried, and it turns out they come after your hosting providers too and get you kicked off that way, they also get you blocked from integrating with any payment platforms (as Patreon competitors have found out). Do you want to use Sendgrid to validate users by email? Twilio to notify people when their subscriptions upload new videos? nope, the thought police are getting you booted off of those too. It's not about making you use another platform, it's about making you shut up completely. If someone actually did everything themselves and made a usable website, I've no doubt they'd be getting ISPs to block it.