How does that work?
By all accounts USC and UCLA were totally in charge of Pac 10 expansion/lack of expansion until the very last minute they bolted. Texas/OU probably the same calling the shots for what B12 did until the minute they left.
USC\UCLA were working under a different structure. Plus there was no GOR to worry about, they timed their departure with the end of their current media deal. FSU (and others) would have no issue leaving in the mid 2030s when their current deal ends.
ACC based their GOR on what the big 12 did I believe, and iirc UT\OU were shut out of many of these meetings once they announced their departure.