The refund glitch is now a feature.

This group was originally formed for the purpose of identifying, solving and reporting Mann Vs Machine bugs to Valve. However, the cause seems to be lost. Many bugfixes have been made by Sigsegv and so few have been implemented that it's quite obvious that Valve doesn't care about TF2 anymore.

With that, there is no particular reason to join or be in this group. However, feel free to do so. Maybe you can lobby a few MvM games, or maybe you think this group is symbolic.