They weren't "opening" for MCS. In fact, they played a full set. Yes, they played before MCS, but really, MCS put up money to get MTB and the rest of the bands to come play. I really thought it was a great idea, to have multiple bands play First Ave & the Entry. Worked out nicely that I could see almost all 9 bands play, & MTB also played an acoustic set to open the show. Was well worth my $30.