Unused account purge/removal
As Mixer has been around for a few years now, there are many accounts that are not used or inactive. For example: Some people want the usernames of the inactive accounts.
Vote this if you want to get a name that is an inactive account!
Should've been first...
At this moment there's an article availabe about Name Release Policy that can be found here http://bit.ly/2wUs7p7
I believe that, right now, this is the only way, the right way in my perspective, to have a username that is already taken.