HildrethLKincheloeOn the bright side: Since they're wasting their time doing this they're not breaking anything meaningful.
Apart from the thousands of players who play the league, yeah nothing lost! Dumb comment, TF2 is too small a game for people to celebrate fact one league is struggling and people cant play. If people in UGC don't play cos of DDoS they might not want to progress their game to different leagues (or stay in UGC longer and longer) meaning smaller future playerbase, after all I bet a large portion of competitive players started there, particularly in NA.
Source: I am starting there this season.