Because they are going to create a coin linked with crypto, which is going to give money to people for using Reddit. I like that to be honest. The problem is that Reddit has never figured out how to tell if someone is a bot or not. If bots were bad before, they'll totally dominate Reddit now. So Reddit will probably release a way to verify you're human, which ties you to your identity, or to captcha the hell out of posting.

Anyways, for people thinking Reddit doesn't already know who you are, I invite you to read about online fingerprinting. It's almost impossible not to giveaway your identity nowadays. You'd have to follow guidelines that would make browsing pretty awful.

https://www.howtogeek.com/735535/what-is-browser-fingerprinting-and-how-can-you-block-it/