Yeah yeah, no-one will admit to this, but judging by the lack of Likes and comments I get the impression people don't have the time or inclination to listen to other submissions. At the start it wasn't unheard of to see tracks with 4 or 5 Likes and a couple of encouraging comments, and yes there were more people taking part then.
Maybe the player not letting people skip through tracks is a barrier. I know that if someone uploads a long track I'll seldom get to the end (sorry!). Sometimes you just want the essence of a tune, especially if you're catching up on a load of tracks at once.
I try my level best to listen to tracks, but I'm not as diligent as I was, sorry to say.
It would be nice to try and foster some spirit of encouragement from everyone, although I know this is probably asking a lot.