re: How does Facebook know when I create a fake account?

That's strange. I have two accounts, one is my personal account and the other is so I can actually voice my opinion on news sites. I have a Samsung phone that will create two different icons so I don't have to sign in each time I switch accounts. I don't use VPN, but I did use an anonymous email to create the account at tutanota.com
Facebook doesn't seem to be able to make sense of my fake account. I put no personal details on there and have not friended anyone. FB keeps recommending friends for me and most of them are African or middle eastern