Interesting, I did not know about that initiative to get people to use post-promotion either. Do you mind sharing a link to whatever post introduced it? I tried post-promotion a couple times when the feature first debuted, but it didn't seem to have much of an effect and once it started to get a bit of a bad rap from people I stopped paying attention to it. Maybe it's time to take a fresh look at that feature...
There you go: https://steemit.com/promoted/@berniesanders/encouraging-promoting-posts