what is the replacement of adsense???

[ssarkar]

IF you check the bidding of any keyword highest bid is always higher in adsense but there is not much difference in the payment for clicks.

well actually the high paying ads don't really go to small sites and blogs , so if you have a small site , it doesn't make any difference to the income from adsense or bidvertiser , though for big sites adsense is good.

they always say about sending the highest bidder to 'your' site. but does not do so. What is the basis on which they categorize the sites for ads? is it pr??.

I have google adsense on my site. My website does not attracts much visitors but some of best company's ads are regularly displaying in my site. What are the causes behind this?