Quote Originally Posted by ssarkar
thanks darksorrow.

Yes I know that adsense is adsense, but as the minimum payout level is high, I can't enjoy my earning from adsense whereas in other two it is easy to withdraw the amount.

So there is no restrction in using adbrite or bidvertiser as I heard that some affiliate programes are very strict about the number of visitors. If you do not attain certain number of visitors in your blog/website, you cannot use their programe.
This is not true. I have been using adsense for over a year. And there is less clicks on those ads. But still my account is there.