How to make money from PPD sites

There are some best PPD sites are there from which you can earn up to 1000$ per month
ShareCash
ShareCashis a revolutionary, next-generation upload site, where you get paid CASH for every download you get! We offer the highest payouts per download, as well as a set of great tools, tutorials, and support to get you earning in no time. Simply register, upload files, and let the cash start rolling in! They have a low cash payout, get your money after earning only $10

FileIce
FileIce is a Pay-Per-Download (PPD) Service that pays you up to $15 on every download of your file. To download your file, your visitors have to complete a quick survey or an offer which would take no more than a minute or two at most. In return FileIce advertisers pay you very high rates on your downloads.
 
Fileflare
It has the best conversions for any PPD Service, much better than ShareCash. It always pays you the full amount and on time. You can check their forums for tons of 'Payment Proof'. I myself got paid recently by Wire Transfer right in my bank account ($35 transfer fee but worth it!). They pay much higher than ShareCash for every download of your file. I myself have gotten paid upto $14.80 JUST FOR ONE DOWNLOAD! It's very hard to get approve your self.