I'd say there is a mixture of both Pink and QB on the list, I rarely even consider dark/defunct shells, way too many skeletons in the closet on those that let their their filing lapse....I've been burnt too many times in the past on those.
I really don't mind Pink's, as long as they are SEC filing Pinks and not those that only file on OTC Markets with Attorney Letter's and such, if they are an SEC filer that has not paid their OTCQB fees to uplist, that's no big deal at all to me personally.
For some reason I don't really care for QX tickers, and have not bought one in ages, and I don't think most of the shell players out there care one way or the other.
Honestly, I don't really see much advantage in QX vs QB, in some ways I think with QX there is almost too much transparency or something...lol....hard to explain but I feel like a certain degree of mystery can be beneficial in shells.
WELCOME TO