Some good points there bro, I see no reason why big influencers wouldn't want their fanbase on more platforms. It is just a way to increase your revenue even more potentially.
I see abuse of power as a big issue here. People who can earn enough just by upvoting their own post won't bother with content curation. If Steemit doesn't find a fix for this we can't expect to see a lot of people joining any time soon.
Sadly enough, I don't have the slightest clue what would fix this issue but I think it is important to point out the flaws.