I don't think it has anything to do with mtgox, i've been hearing alot about it being a scam for a while now.
I've used coinabul before and only had good experiences with them.
I know they can be a little slow, but definitely not a scam.
I can't confirm anything, I just keep reading bad stuff, could just be the competitions attempt to slander though.
Best of luck to them if it is legit, hopefully they aren't also having issues with DHS.