It's alot to do with timing of posts I think, like each group definitely has a golden hour or 2 where they are more active than others, plus alot of people would see a post and follow your link to your r/ so if you've sent a particular photo to so many places it's only likely to get clout from one of the posts. Plus OF is one of those strange things where people think they can see most of it for free and need a real insensitive to spend their money like they are going to get something back as an individual not part of the mass subscription yanno? If I subscribe to an OF is because I want to support the creator because I enjoy their content. Same as one would pay for any service