Where does file hosting site earn money on PPD?

[UploadingSky]

Hello All.
Where does file hosting site earn money on PPD?
I mean if they give about 45$ for 10.000, how they earn money from it?
What are the best ways?

 

[Matijasevic]

Mostly from ads, they offer these rates for 1 unique download per 24 hours, and downloaders visits more pages, so they earn from these visits. They use all types of ads, PPC, PPI, PPV, Popups. Also some sites managed to add google ads on ppd sites, so their earnings are higher.

Second way is by selling premiums (this is rarely on ppd sites, but still some downloaders will buy it).