I'll echo what @kambreapratt has said --
There are some good individual creators on Hiveworks.
But to be blunt, I think of them as the "Webcomic Mafia."
Without going into too much detail -- if you're not with them, you're against them.
We predate Hiveworks by a year or so, and watched the group gain momentum from three or four comics to whatever it's at now. The attitude of their founder really runs contrary to the tightknit, friendly webcomics scene we started out in. Not something we're interested in being a part of.
Most collectives can't offer you anything you can't do on your own. It's just a group of individual comics sharing an ad network and links. The comics that pulled big numbers before Hiveworks still pull big numbers on Hiveworks, and will continue to pull big numbers after they leave the group. It will still be up to the individual creator to build their own personal platform to ensure their comic's longterm viability.
That being said, I agree that SpiderForest might be a good alternative. We know a lot of the creators over there, and they're pretty solid.