is tribalfusion a pay per install program??

[moustafa]

that looks like a nice deal then..i wasn't sure about their number of displayed ads..much thanks guys 8)

is this a system of clicking daily ads or installations ?
i got confused .. provide detailed info..

Its a PPC program moustafa, you get paid when someone clicks on the ads displayed on your site..

so this require that you buy a package for many ads so that visitors can click , right ?
and how much can you earn by that way ?