Okay, here's my idea. A normal person is allowed to download 4 tracks per a month. If you rate a track, you get 1+ download. Doing this, would increase rating's very well. Also, another idea along the lines would be to award them with more Downloads depending on how long the ratings are.
-Example-
200 characters - +1
500 characters - +2
800 characters - +3
This would be fair to everyone, you would get 3 tracks, where you can either save throughout the month, or spend em all at once. But during that process, they can rate other people's tracks and get more downloads for more tracks. Lastly, the download count would reset every month. Depending on what the site owners want, they can have it set so points gained by rating tracks are kept til they are spent. So people can save up rating points for a while to use in the future. Sure, there may be some small problems regarding random patterns of rating's, but for sure it would raise the rating count in general.
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FAQ
What if someone spams a rating/false rating/etc?
It would be dealt in a '# day DL suspension'.
What if people don't download the more simplistic tracks?
That's the uploaders problem, it's their priority to make something that looks entertaining and attention gaining.
Could you save up Rating points?
Although Daily month points reset after the month ends, you can only save up your rating points.
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This is just a little suggestion I had.