RE: Steemit will never need to start selling Ads because we already sell Steempower which gives any potential advertiser the ability to promote their posts AS the ads themselves and send their own post to the front page by self voting!

Okay, I think this is exactly the kind of thinking that should be abandoned. First of all how many go to the " front page" . Promoted and hot categories are really the place for those who have made large investments in steem and can thus benefit from this platform. That will always be small pool.it is simple the mechanics of the situation. Why would a company place an ad there. There are so few views.
Would I look at an advertisement if it was not inserted in the middle of a TV show or if not inserted in the middle of a Facebook page. People don't go to an advertisement. They have to be lured into it
If coke promotes an ad in a post and then allows the ad to be shared and reposted by the initial set of viewers and so on then views get much higher but still not enough people on the platform for it to be effective. There may be billions some day. Until then never say never. Business models expand, contract, change. The minute both sides can benefit, ads should be brought in.