I don't understand why she doesn't just create an OnlyFans account.
If her aim is to make money, she's not going to make much money informally trading nudes for a few bucks via Snapchat to the handful of guys that are aware of/still interested in her. Sure, she'll make a little cash to buy her some trips to McDonald's or some stupid stuff on Amazon that she doesn't need (i.e. swords, plastic Star Wars themed crap from China), but she won't make enough to buy herself a house, or new cars, or live independently from her earnings.
On OnlyFans, however, capitalizing on her past YouTube "fame", she'll gain tons of new paying fans who are already used to the platform, plus the guys that already know her, and she can honestly blow up and rake in hundreds of thousands of dollars a year.