The money you get depends on the CPM rate of the ads. CPM stands for cost per thousand views. If you receive thousand ad views, you get the money said there. If you get less than thousand views or over thousand views, you get the money for those impressions with the same rate.
If the CPM rate is $10, 1 ad view = 1 cent
$1, 10 ad views = 1 cent
and so on!!
There's a contest next week called "Drano" which will have high paying ads. Be sure to take part in there to get some cool bucks!!