Been a leecher/donator for awhile now but I wanted to post something I found out. Not really sure if its been posted somewhere I just wanted to share my find.
If you change your name or know of a name that is locked for 90 days due to someone changing it you can put a ticket in to request that name. For some reason the blizzard reps can unlock the name like they would a character that hasn't been on in a long time. Not sure if they know the name is locked due to you changing it.
Example:You name change/race change a lot. You can use different names and have the old name unlocked that same day. I've done it numerous times.
Like I said, not really sure it's an exploit. Just wanted it to be known. Have a great day. :]