Let us not hope that if a lot of people join Steemit just for the profit potential that people from the west will abandon it.
People from poorer countries might drain the rewards pool by upvoting each others posts on a rutine basis (just posting a short message and a network of accounts upovote it).
That would take the excitement out of Steem and people might start to abandon the platform.
I really hope this will never be the case.
That is kind of my concern too, although I do not know if it is justified.