For the first half of your post, I feel like this would be a more of a suggestion type.. sentence I guess. It would be interesting if the account Marketeers were put back into use, to sell rare items that can't be obtained otherwise.

As for the second part, refer to this thread:

http://forum.toribash.com/showthread.php?t=343024

This gives you all the rules and requirments for a namechange.