Pretty annoying, though, that they hijack users' familiarity with the red dot to deliver the useless notification that "You are not logged in on this device".
It's essentially an ad that gets you to click it by making you think you are somehow logged in on a site you don't have an account on. I emailed them about this because I think it's an awful pattern, and did get a response but not one that indicated they understood the problem with this deceptive marketing technique. It makes me avoid clicking links to dev.to.