I am one of those users who features other people's work and makes money off it, but it is quite transparent and the people submit their work to me. I'm talking about the Steemit Photo Challenge. I keep all of the Steem Power that comes in, of course, but I give away the majority of the post rewards. Users know that they stand to win with this contest, and enter in hopes of winning. So I consider it a win/win scenario.
You can see it in my wallet even today.