Delegation distribution among all the active members of the community will ensure better adoption and will also reduce the need for marketing.
Ofcourse, by active I don't mean "nice post dear follow for follow" kind of active but engaging people of the community. When members have enough SP to be able to give votes worth something, they would definitely try onboarding more of their friends.
Edit: IMO, this would also solve the problem of good content getting buried before getting any exposure. Sure, there would be some people misusing it too, but there are always loopholes.
What about air drop? Has it ever happened on Steemit before? Also what do you mean by "best" Steemians?