My tinfoil hat theory... she recorded a few terabytes of content before she got her boobjob and will slowly drip-feed it to us over the next several years. I mean, we already know she has several videos that were never released, so it's quite possible that she has more. This would allow her to stay 'retired' while still staying relevant with 'new' content. It also means that she'll never age, so her barely-legal fetish core audience will remain happy.
Then, fast forward 18 years, after she's divorced and her kid is grown up, she makes another comeback YouTube video, except all of the sudden she's a MILF, thereby giving her a whole new market to cater for, while also stirring up her trademark buzz ("wtf, how did Belle age so quickly?!?" ... "is this AI-generated Belle?" ... etc.)