Before I read that DD2 was going F2P I figured that DD2 would actually just have a set release cost. Following this release there would be planned expansions or patches. With each patch there would be an accompanying cost. As long as the game play is there, it shouldn't be an issue marketing the game as such. Kickstarter could be good or it could also not work out as planned. I couldn't imagine using Kickstarter for anything but getting the game launched.