All else equal (ha there's a broad statement) if cryptx reinvests a larger % than the difficulty rise, petamine will have a seat at the grownups table. By having enough $ to be a lead investor/customer for each next generation round of ASICs petamine can stay ahead of all the others buying the same chips.
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It's the supermarket effect, once a handful of players become dominent, suppliers are at their mercy.
I agree the reinvestment % can be changed. But not now, at least not until they start the reinvestment deployment. Need to see how efficiency CryptX uses these money. If they are able to bring us cheap hash rate, then increase the reinvestment part would be great! Otherwise, I prefer let the money come back to their shareholders. So, let the time tells.