[dylan604]

I would suggest removing your artificial filter limiting your thinking to porn. During the days of BBS type sites, the monetization of personal information was not a thing. Forcing a user to be identifiable in a government mandated manner means the data gathered about you becomes more valuable because it can be pinned to you, not an account you've made, but to you. The government likes the same result if not for the same monetary reasoning, especially this government. Knowing who you are, what you've said, what you read, watch, listen, as well as where you are/have been will all be valuable in different forms of value.

Any reasoning after that is just fluff to get people not looking at it critically to accept it.