You can earn there by uploading files. Every download ur file = 1 point. 10000 points = premium account which u can sell (in the Poland it's around 5$ per premium account, I don't know where u can sell it).
Uploading.com and others are much better than rapidshare (limits, and much worse earnings).
Thanks friend. May I know then why rapidshare is more popular than other uploading sites? And what is the benefit of getting rapidshare premium account?