Yeah i think you pretty much hit the nail on the head when it comes to the "interchangabilty" of a lot of OF girls as mentioned by
legacy123 . Fundamentally there's very little difference between skinny-blonde-insta-thot-with-a-bbl #1 who films with her iPhone camera and skinny-blonde-insta-thot-with-a-bbl #2 who does the same. So if someone's going to shell out the money for one of them it's not because of how they look it'll probably be for secondary reasons i.e. how active they are, how much content they have uploaded etc. Otherwise, yea a lot of them are simply interchangeable.
It goes back to if you already have a following, you can charge more. I'm reminded of Bella Thorne , a c-list actress who made an OnlyFans and was charging like 200$ and ended making a million in a week or something. She had two things working for her; hype and imagined scarcity.
Hype because she had some degree of fame and was a regular actress making an onlyfans so people wanted to see it because it was novel for a SFW to do something like that. And imagined scarcity because she priced her content so high, it made people feel exclusive to get it and see it.
Run of the mill OF girls can't do that because for every one of them charging 100$ for a 30 sec video, there's someone else just like her, charging way less for way more.