Hi Gerdzon,
The install price varies depending on the app and the country of the install, it can go from 30c to $5. On average it’s between $1 and $3.
You’re only paid when a user installs an advertised app. We really believe it’s the best way to earn money with mobile advertising as advertisers are willing to pay a lot for an install.
Don’t hesitate to contact us if you have any other question.