I agree completely @farizal about the Whales. They do not post which means their take of the reward pool, from the author perspective, is limited. They do tap into the curation through their support of bots.
I would not overlook the contributions of the Minnows. That group has been gain steam of late. There are now enough of them who are active that they are starting to gain momentum.
We are starting to see a nice middle class emerging. I am looking for the Dolphin/Minnow MVest total to surpass that of the Orcas in the next month or two.
That would be nice... although there is a lot more to convince new healthy users to come on board, there is still a lot of work in the path of making it easier... I know many may ask... how easy can this get... but believe me... many... need easier! Not because it's difficult... but because they hat losing time... even if they win money!