Wouldn’t it be able to tell from session cookies?

Oh definitely, thanks for sharing! It was an interesting read.

I think it has to do with the frequency you create accounts. I’ve had it let me make an account, and I’ve had it demand more info.

Then I started using FF Relay —I know it’s not super private, but this is just trial circumvention— then sites stopped accepting the Relay emails.

Privacy doesn’t really exist in what way? In a sense that the layperson should be concerned or just a person of interest in a diplomatic position?