[corin_]

It seems a bit random whether they do it... I'd quite like to get my first name (@corin) which has one tweet, posted in July 2007, and no activity at all since. I appreciate their policy of not allowing you to request they kill a dormant account, but after 7.5 years you'd think it might have been released by now

[toyg]

it might have been used for private messages all this time, or for oauth logins.

[corin_]

Oauth logins possible didn't think of that, not direct messages though as isn't following anyone. After 7+ years I strongly suspect it isn't used for logins either, but could be wrong.

[TazeTSchnitzel]

For OAuth purposes, surely the profile can be renamed.