I guess that someone else already suggested that but I didn’t find any topic with “Search”.
Basically the idea is: make the Commander ability account wide and not character bound.
The 100 Gold price was meant to prevent everyone from buying it. So only people who really want to/need to will buy it. Then the question is: why they have to spend 100 Gold for each character?! The person playing is always the same, so why forcing to buy it again? In my opinion it is a very bad idea.
Make it account wide and refund 100 Gold to people who used it on more than one character (if anyone ever did it).