Been following about as long. When her dad did the filming and editing, he knew what the audience wanted. Approx a year ago, her sister Olga posted on her tele that he had health issues and was very limited in the filming these days. The content since ( and for a while before the post) has been ehhh. If they ever list a vid at $30 or $50, we might get a slip again. Your breakdown of her YT timeline is pretty spot on.
I've been following Milana since her first Youtube videos, when she was 1x2x years old. Her father noticed that the "peeks behind shirt" shots, increased the number of views, likes and comments. Well, and he started smuggling in such hot views. Users gave each other time stamps of the best shots in the comments. Finaly Youtube started blocking her account.
It's just business, not a father's admiration with his daughter - in my opinion.
Besides, her family is very religious (Orthodox). Well, and they live in a country of total surveillance, where anyone can denounce anyone.