I am afraid there is some misunderstanding about Darwinia.
Darwinia is a big lotery because of the monthly basis witch compute the return. Of course, good traders having usualy good results have very more chance to win. At the end of the month, it is easy to watch each EC, then discover the turkeys who have had an uncredibly lucky month.
Then it is easy to split awarded traders in two class : Good traders / Incredibly lucky this month.
Of course, Darwinex will not bet on turkeys. Then they will pay if a miracle happen : a looser win a 3 month HVM. Mathematics expectancy of loos is less (very less) than covering position on all the loosers.
It is noticeble that Darwinex has some quant skills. For sure they know something about mathematics expectancy.
So, what was the question ? Is it unfair that Darwinex does not cover every Darwinia's AUM ?