If the rewards become less "top heavy", far more than 400 creators can earn significant rewards without the Guild's intervention.
But then another potential "Guild" can step in and aggregate another community of curators, which will redistribute the newly assigned rewards.
It only seems logical that, if more authors will receive more significant rewards, there will be more at stake. I didn't say "the guilds will increase in influence" with some sort of a judgement, like this will be either "bad" or "good". I just observed the possibility that new communities of curators can aggregate again, because there will be a more even surface of play. How this will tilt the balance, it's still something to be determined, IMHO.
Excellent point. Perhaps this will work like the entire system. Instead of a couple of large guilds, there will be many small ones. That would still help with the desired effect. Instead of rewarding 400 content creators, 4000 would be rewarded... or more. But you are correct, like everything here, we would have to wait and see the effect and then come up with another tweak if needed.