Splinter forums like this are good places for people who have no interest in joining KF (especially now that it's invite-only, and who knows how long that will last), or for those who have been banned from KF, or for people who want somewhere to hang out when KF is down from yet another DDoS or web hosting issue. I'm in the first group, but I also like that it isn't as high-traffic as KF. Due to how many people are on the site at any given time, it's hard even as a lurker to keep up with some of those threads!
If nothing else, the diversity of places to go for this type of discussion can only help things, especially if sites start going down.