Leon Fu - I don't think advertisers would buy a bunch of steem to power their posts/ads on this system. That would get their posts visibility on the front page but they would have no idea if the eyeballs looking at it are interested in their product. Advertisers want targeted ads which they can get on facebook because FB has so much information on each person's profile that they can deliver a specific target market to advertisers. Steemit would need to incorporate a similar model to get the same ad dollars.