I agree that influencer marketing, esp on Youtube, is probably the most effective marketing one can do. I think a SPS proposal where we pay some top level people to do some interviews with Andrew or Eli. If we can get a high quailty video ad done, maybe we can pay them to show it before their videos.
I have been trying to do something like this, I have a 100k steem delegation to get a big youtuber here and talk about Steem. I think a lot of people outside of Steem don't realize how beneficial having SP can be.
But ya, the only way I can think of is either get a big Youtuber that would take a delegation or we just pay them to promote Steem.