It is difficult to provide an average number, because there are so many different variables parameters taken into account.
The type of traffic you are sending.
The countries from which your traffic is originating.
How the campaigns perform across your app/site.
If we are receiving metadata from you (e.i. latitude/longitude, age, gender, etc.). Typically, targeted campaigns will have higher price points and tend to perform better.
- The time of year. The advertising industry generally sees fluctuations in demand depending on the time of year.