The cosmetics in GoW3 were handled alright. I do agree they went a little overboard with the number of payable skins, should've released some of them for free. There were way too many, in general, though. I actually never bought a single one, although I was tempted many a time. They had a fair number of weapon skins in game, as well as loyalty rewards for doing things in previous games. Not only that, they had their own seasonal sets of skins that they offered free to everyone, alongside the heads and such. The payable weapon skins looked pretty sick, though.
GoW3 was such a great game, it's unfortunate there aren't even tens of thousands of people playing it anymore.