I feel like this is a good point, although keep in mind that games are "judged" not by how many ratings they have but the average in each category, so even if a game has a lot of good "marketing" it might be rated a lot, but poorly. To be honest I think maybe the "marketing" practice is a good thing, for us new devs, this kind of experience, of trying to get other people to play your game, is a learning experience as well. I see why it could be thought of as unfair though.