Currently on adsense, not happy. Thinking about adbrite

Im currently on adsense and never get over $2 per day from 10,000 page impressions. .Apart from a couple days ago where I got $7 for some reason but apart from that I have never got abve $2. Also from what I remember from the last time i checked my stats I get 40,000 uniques a month. I am very unhappy as people with the same impresisons as me have told me they make $30 a day which s very believable.
I want to know if people think switching to adbrite would be a good idea? Im currently on around $70 since my last cheque from google so will wait to it reaches $100 then if you guys think I will get more money from adbrite I may switch to them. What do you think? Have you had any experience in a similar situation? +rep to helpful answers, thanks.

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