Another thing is the platform is growing, so curators are faced with more content to discover than to curate the current user base. To curators, it wouldn't really matter who/what they vote for, they would still get 50%
This and this:
I personally don't care about my curation rewards, my joy comes from the work of people I support. I think curators greed may be driving that push for 50% which I find very steep.
I saw that as the driving factor from day 1. Im a smaller account then you and i vote stuff i find enjoyable, i never calculate before i vote, i care little if my VP goes down..
My behavior will not change and i dont think the behavior of those that are using the platform "as intended" will either.