Thanks to @PTR for clarifying my question on discord. You are totally right.
I forgot that this is also how TC worked. Both MMC and TC try to estimate how much more (or less) of a model is needed in the Meta Model to improve its performance.
So MMC serves to optimize the weights of the models within the SWMM.
From the hedge fund that seems reasonable, but from the user perspective it is totally unfair. The users would like to be paid on how much their models contributed to the performance of the SWMM. That part is the 0.5xCORR, but I believe that is too low for the risk associated with NMR.
Using the stake, and hence payout, as a mechanism to optimize the MM is in conflict with how the users see the stake and the payout and I hope this part of the tournament changes in the future.