Preservation is actually a big benefit. There's so many models who seem to believe (or pretend to) that the sub price and everything you pay to unlock only entitles you to look at the content on Onlyfans for the duration of your sub. At the same time, I've seen a bunch of profiles who, from one day to the next, suddenly decide to 'change their business model' and either delete all previously posted content or turn every free wallpost into a PPV.
Like, imagine being subscribed and thinking 'man, I really wanna look at this picture again she posted 2 months ago' but hey, now it's either gone or you gotta pay $10 to 'unlock' that specific post. Emma Kotos did that, she nuked her whole OF, then made it 'free' and all PPV and VIP stuff. If you didn't save her content before, you were shit out of luck. Or models who randomly decide to abandon or close down their accounts, basically eliminating everything on their profile.
It's not just Onlyfans of course. Only recently Sara Underwood closed down her Patreon after several years. A Patreon that had hundreds of high res nudes and an archive with dozens of her travel log style videos going back years. And she did it in such a shitty way that she basically just made a post announcing that it won't continue next month and unless you were already subscribed or even subscribed to the right tier (with videos), there was zero chance to save all that stuff because you couldn't subscribe anymore.