It's a good suggestion to keep an eye on promoted posts in order to support authors and such, but I feel like its just another tab. I think that the way it is executed needs to be different, to bring value to the cost. For example, popping up on other bloggers' posts would be great bang for the steem buck. Forcing it to the top of the pages of the other tabs would be even better a la google sponsored ads. Even above the fold placement in their chosen categories would be pretty sweet.