The $30 is for lifetime in her snapchat. How long she will use it or update frequently who knows, but at least isn't a re-occuring thing.
I'm hoping for more too, I would guess at first at least she will keep the slips down some until she sees if people are screenshotting and posting what she sends. then maybe a bit more.
As to the retirement zip, I've seen similar things happen. A camgirl who never showed vagina and teased it constantly started showing everything for a couple of months before she retired. You never know. I doubt we will see that but we can hope.