I searched for my username and was shocked it was used on literally every website you checked. Then I tried a less common variant and was similarly shocked, until I realized that you were showing me fewer websites the second time around. Only then did I realize you only showed me sites where it was already claimed…
when I signed up to HN, I had a different username. I reached out to admins and they looked at the other account that had been created but they let me have it because the person hadn't logged in since. Oh! I think GitHub did as well. (shit, I wonder if I have mixed up GitHub and HN... I'm pretty sure they're the two that did actually let me have my handle... :x)
Why would it be a good idea to recycle usernames like that?
I mean, obviously I'll live but it's a silly situation.
I can confirm that GitHub definitely does that.