I think it's pretty obvious, that Deepquickhunter is just an alt of one of the regular members here. It could be that it's a scammer's alt to mess with people, but in my opinion that's unlikely. Not much to gain in pointing at new accounts indulging in giveaways. It's rather a member who got fed up with key scamming due to multi-accounts, but doesn't want to use his main account to speak out. Who resents him doing so? All he can gain is heavy downrepping by the very same multis. The question is, whether pointing fingers is the right thing to do here or does it more harm then good?
It has already hit new members that I don't take for scammer alts, but on the other hand I think he's right on spot with some other accounts. Although I don't like the limitation of giveaways, Sachys and foxworks do have a point in stating that dumping threads feed the trolls. While it's convenient to have a regular place for these things, it makes it very easy for scammers. However, don't forget, that it's also these dumping threads that makes it very easy to spot some of them and that's a good thing.
IMO it's more likely that it's the scammer's alt. He wants attention and it's easier for him to get attention by "hunting" himself and/or others.
If it was a regular member, it wouldn't make much sense for him to be using an alt. Yeah, he could get derep'd.. but I don't think that's enough of a reason to make an alt just for that.