Perhaps I'm missing something, but I fail to see how this is relevant. If the majority of miners are creating longer chains of blocks which include > 1MB blocks and all of the participants that I care to business with agree that this is the valid chain to do transactions on, then what I do give a crap about whether or not MPEX or anyone else does with their coins? Whether they sit on them or spend them on both chains makes no difference to me.

Hard forks only matter to you if you're on the short (wrong) side of the fork, otherwise it just means a faster block rate until the next difficulty adjustment.