You really can't get all paid content for free. Actually most paid content you won't find for free. It's not that easy.
Sure if they're a popular OF creator someone will likely be ripping their stuff but that dries up really quickly when you get to creators with like only a hundred patrons.
The more niche you get the harder it is to find new content for free (pirated or not). That's why people pay for it, they like the content and there's no other way to obtain it (and they want to support the creation of it obviously).
Even on sites like that you can't get everything, since it depends on subscribers actually sharing accounts and not all creators will have those. Trust me, I've really scoured the internet for certain creators' content and it's just not out there.
Also there are sites beyond OF, a lot actually. There's just no way to get everything you want easily if you're into certain stuff/creators.
I get that you find no value in porn regardless of type so you wouldn't pay for it, which is fine, the majority of people don't see the need to pay for porn either, but I hope you'll at least understand some people do find value in the content they like, enough to support it. It's like subscribing to a youtuber's patreon, their content is still free for everyone but some still want to financially help them.