I, and I'm sure you are too, have had enough of spoiled fan bases tearing at overly generous developers for not giving them things that they have been getting for free for ages, but when the developers ask for some cash for their work, they are met by anger, and all around idiocy, this group is here to stop that.
Also, Valve made claims that they were still working on L4D1 DLC Official.
We are a community of game and mod developers, and we've all shared the experience, yet, some of us still haven't learned anything from such an experience...