Hm that’s weird. You might want to ask @Meta or @starsmiley to help you. But it should be fine to take.

I think taking usernames got removed

There has been a thread about this recently https://www.speedrun.com/the_site/thread/ofvdr where @Meta has said to submit a support hub request

Maybe it’s to prevent bots from repeating accounts every six months.

@Pear no, it is an oversight because with the new settings page they have updated their endpoints