It's actually against the ToS to talk about this to a certain degree.
But just to say that it depends on allot of things such as CTR. (click thru rate)
For example once I made like 5 bucks on one click, while some days 1 penny. But the 5 buck click might of been the only click in 10 impressions that day, while the 1 penny one might of been one of 100 clicks in a 100000 impressions. Just throwing numbers here for examples.
Also I think it depends on what the ad topic is about, some topics pay more. It seems technology related ads pay more since I'm making decent cash through Iceteks. The site's budget is curently at about 800 bucks right now, and that's after renewing the domain for 10 years.
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