If I did that people would abuse the Downloads system. Also, I'll use you as an example. Points for Downloads has gotten YOU to start posting, Joe.
The forum would suck if people didn't post, and I'm not going to offer 300MB downloads to whoever feels like downloading them. BANDWIDTH!
Just be glad Downloads isn't a Network Partners only thing - where you need a paid subscription to the forum. I was considering adding a way for you to buy points with PayPal if you were too lazy to post, though. That way I could at least use the money for the bandwidth costs.