She actually doesn't post much on Patreon either. She literally posted the one video last month and the set that goes along with it (in the DM's), some photos that she also posted on instagram and then teasers for next month's set.
As far as going nude, I unfortunately don't see it happening any time soon, if at all. Patreon's TOS doesn't permit nudity, so she could've gone topless or full nude at any time. Onlyfans is simply a way for her to branch out into a new subscription based model. It comes with the benefit of not having to sign up on the first of the month and great for people who don't use Patreon at all. She got 18K followers on OF in the first week, and it tapered off so she's only made it to 20K by week 2. That still shows that her "brand" is interesting to people, and will be secondary income once she starts charging.