Well I find it remarkable that this is surprising to anyone. I just joined the forum 5 minutes ago, because I wanted to download some dj sets. Then I learned that I have to make 10 posts to gain access to the downloads. Its entirely natural that the first thing that comes into my head is spam.
The problem is that I really have nothing to say other than this post. There isn't a hope in hell that I will find 9 other genuinely interesting things to say about listening to trance music other than rehashed ways of saying "I like trance" or "isn't this mix excellent".
Forcing people to write messages guarantees that the quality of posting goes down the tube. People are either interested in forum'ing about trance music or they're not.
Given that what I am interested in is downloading some music, I am happy to do any of the following:
1) Pay for it
2) Hypothetical: say I was given credits to download 2 or 3 files when I first joined. This lets me get up and running immediately and sample some of the music that the site has to offer. I am not faced with the 10 post obstacle I am faced with now. Once those 2 or 3 credits are expired, then I must get more by either a) posting to the forum

paying/donating c) uploading files d) other stuff that I cannot think about. This brings me gently and more willingly into the site, and might, psychologically speaking, ensure continued activity because I can grow into it.
Anyway, thats post number 1. Its a genuine sentiment. Now I have to make up a ton of garbage just to get my other 9 posts done. Hmm, nice weather we're having....