Only Fans allows creators to have two pages - usually one "free" page where it's filled with previews and you legitimately have to pay to see everything (and there's probably a premium to it) and one "paid" page where you pay the one subscription fee and probably only pay for xxx videos, etc. There are forums on reddit that allow users to provide reviews on OF and then there are twitter accounts that run reviews. There was one that I am currently struggling to find, but he was great. He would subscribe and spend the month on the account and then give you constructive feedback based on the type of "vibe" you were going for whether that be more of an online girlfriend or virtual pornstar or something in between. It was actually uber useful and helped immensely.  

 
Also, I know I stress this a lot but reading is fundamental. Not all content creators are the same or have the same style. That said, may have filled out their OF "about me"/bio with information regarding what content you can expect. This is so a user can make an informed purchase and ALSO manage their own expectations. For example, a lot of providers who don't engage in content collaboration will have a note in their bio stating "no g/g or b/g porn on my page". If it happens, which from time to time it does, great... but don't expect it.  

 
In addition, I will stress this - communicate with the content creator. Yes you paid anywhere from $5 to $30 (the content creator only gets 80% of that), but after 30 days, if you paid $15, it breaks down to $0.50/day. So for less than a dollar a day, you get a direct line of communication to the content creator where you can get to know them, request content they might not post publicly, commission content that's more your style, etc. You never know what a "hello, how are you doing today?" might turn into...