I'm sorry but adding coins is a non sense...
I don't even understand why we do have to pay for MintPal greed...
Mintpal has to run a business, it's totally understandable that they simply can't just bail out every victim of a coin that was under attack in some way. They are in the same learning-process as we are with weekly hyped altcoins and all this different attacks for every damn coin any given time.
To me it looks like they are doing their best. I still hope Mintpal will keep nc2/nc3 after the transition, because I never had problems with their plattform and they can manage volume better than other exchanges. They obviously are on their way to the top and should have such a unique coin like c2/c3 in their portfolio.
I love mintpal too and they are mostly doing great so far. I'm really happy to move there from Cryptsy. But why would I pay for their learning process? When I do mistakes trading unwisely I'm paying with my own money for that. I guess they should pay for their mistake by themselves too.
Just my 2 c2

My understanding is: If they pay for every scam or error by themselves without some help from us customers, they couldn't compete with other exchanges and could be forced to fire staff and would therefore lose their quality edge which got them their good rep in the first place.
They get scammed and they make alot of errors, I fail to see quality edge. Why do they exist, what do they offer over other trading platforms?
Decent historical data?
Detailed customisable charts with analysis?
Blurb on the coin, links to use to educate?
Mintpal is just another toilet to dump shitcoins.