This website contains age-restricted materials including nudity and explicit depictions of sexual activity.
By entering, you affirm that you are at least 18 years of age or the age of majority in the jurisdiction you are accessing the website from and you consent to viewing sexually explicit content.
They said per-account email addresses, presumably meaning that when giving out an email address, you would use a different one for each service. That way, they couldn’t be used to link you across services, and you could easily delete one (and know who to blame) if it was abused.
Yes, I understand how email aliasing works. Again, how is that more private than a username?
I don’t see a claim of it being more private than a username. Perhaps the person you’re arguing with views them as equally private, or is thinking of services that require some form of contact info. I can’t speak for them.
It’s right here:
But you just did.