I can see from the chart it seems you don't upload many 450+ MB files. My suggestion is to upload less small files and go for files as close to 450MB or more as you can. Small files wont net you enough to add up with fileserve unfortunately.
these are the worst days in my uploading life, I'm so lazy that I haven't posted anything except on my own site (
[slide]http://i.imgur.com/TdBP1.png[/slide]
OnTopic:
Register on at least 10 big warez sites and be an uploader on 4 or 5 star katz site, Buy a Multiposter, RDP, and FileServe Premium Account, get your eyes open on upcoming releases.
Always try single Links. that is the best to earn more money. many free users are tired of downloading many files. They only like single links. so my choice is always single Links.