My 100% wild guess is that she landed a major daddy. A married dude with money that has no end. He probably gave her conditions, one of which was probably eliminating as much of her internet presence as possible. A calculated guy who isn't willing to take any chances with his wife finding out and losing a big chunk of his fortune to divorce.
The offer he gave her was probably a very lucrative one to keep her off social media entirely. I don't think she just up and decided to go underground on her own. Her social media accounts seemed like a beacon for sugar daddys without having to put herself on a seeking arrangement type of website.
Again, I could be wrong on everything, this is all just a guess. But I can't think of many reasons that would take her off social media considering how much attention she was seeking out.