So i'm sure you have seen those websites in which you can see some content but if you scroll further, it asks for a login/sign up. A workaround I used to have was to open the link in another browser but seems to be not working every time.
So it made me think of user agent and maybe that's what those websites are logging to see if its the same "person" again. I literally made an account to ask this. I'm really curious so if you guys could gimme a hand on said subject that would be awesome.
Happy Holidays and Merry Christmas