I've been around this 'community' for about 10 years and I'd say the average stay is probably about 2 weeks - month before they abruptly leave and nuke their content. Seriously, most of the sexiest bellies ; ladies I've seen never stuck around long enough to make much content or for it to be saved.
In some ways the more eager and ambitious someone is when they hit the scene the more likely they are to leave within a month or two.
Partly due to the infestation of disrespectful weirdos who harass them but also the internal conflict of 'ruining' their bodies once the initial wave of novelty and ardor wear off
The former issue could possibly be improved with better moderation but the latter issue will always exist in this space