There are a lot of people selling primary accounts on Facebook, it's safe? how they get those accounts?, when you ask for them the rules are:
- Don't login twice on account.
- Don't change any data on account (email or password).
- Don't buy or delete games on buyed account.
- After activation play ONLY on own account!
- Don't remove account or games (until you need game or account).
- In case of a refund, crypto currency is made in the same currency in which the payment was made
IDK how the do it, I read and search a lot, there's no way to duplicate a primary account, thinkin on Netflix accounts I search on DarkWeb but there's nothing there.