I am little curious why devs didn't create aliases 
or why almost all big stakeholders didn't make aliases 
or why almost all big stakeholders didn't make aliases I have a separate alias account. They may do the same.
so they had to buy some nxt by dgex
Btw, how to delete an alias:
Create a new account, send there some coins, rebuy your alias by using a pass from 1st account for 1 coin, then buy the same alias for more coins by the 2nd acc passphrase