Yeah, it's something along these lines, I believe. But there is still a lot of grey area it seems, so some people refuse to make uncensored content at all, no matter the platform or target audience. I'm not sure anymore, recently seen a news article about some girls arrested for selling uncensored porn through twitter, don't know details.
She has her streaks of heat where she uploads better stuff, like showing her butthole every now and then.
She probably knows exactly what she's posting, the videos you're talking about aren't censored as much as others for example. It's hard to describe in words you just have to compare them and you'll see that the mosaic is very different, some are very strong and some are very light and easy to remove. I've tested this hunch and it's actually true. I think she puts the light mosaic on purpose so that her videos will be decoded. But I'm not sure if she adds it personally or if the Fantia site does it automatically. I think she does it herself in the editor.
All the creators are responsible for their blurs, oshiripunipuni used to be really careless and there are plenty of "censored" videos where you can see her pussy for at least a few seconds
She posted that she would be taking a break for several months starting january but i guess she started earlier, i'm still subbed to her fantia but if by june she hasn't returned i will cancel it.