A recent trend I am seeing, is games offering online payment through Bitcoin, wants to force users to login via Facebook. {This is also one of those sites}
I do not know if it's related to KYC/AML regulations or if it's a way to farm social media accounts, but it's going against everything Bitcoin stands for. Why do you have to link a person's real identity to his
online gaming account? My kids wanted to play it, until it asked them to login with their facebook account...{For security reasons, according to the error from the site} then they chucked that idea.
Most people do not even want facebook accounts... because it's a platform for bullying amongst some people and a invasion of your privacy.