Player rating for tournaments across all installments of Heroes.

I agree. But there is also no accounting for the popularity of the tournament. Everyone will always receive the same amount. Personally, I would like the number of grails to depend on the number of participants.
But if the majority votes for the option proposed by the esteemed VDV_forever, then that's the one that will be adopted. I'm not insisting on my own.

It seems to me that this problem should be solved more simply. Well, how many people can actually participate and make it to the end of a tournament? We already have experience with this. Just create a scale for awarding grails based on how many participants submit their final save.
up to 5 - award option 1
from 5 to 10 - award option 2
from 10 to 15 - award option 3
and so on.
Why bother with recalculations and complicate the calculation systems? Who is going to do all that? Moreover, many people don't even try to understand these calculations; at first glance, the system seems confusing and complicated to them. Consequently, there is no enthusiasm. It needs to be simpler.