I want to make use of the adsense competitive ad filter to screen out low paying adverts (not all of them but just some). However my dilema is that i don't know which ads are low paying. Does anyone know if it is possible to find out which ads are low paying or is this just impossible? If anyone has any specific information or websites that i could find information about this on then that would really help. Thanks for all your help in advance from a grateful Englishman. Long Live Obama
I guess you can't check which Ads are paying you less however you can use Adsense preview tool to see which advertisers are putting Ads on your site. You can visit those sites and if they appear to be just MFA sites, you can afford to block them as they generally pay very low.
Be careful when filtering out, what you consider to be, low paying ads. Filtering out ads limits the number Adsense has to choose from - to display on your site.
Can you use adsense channels to filter ads? If you are not getting results (which is what I think you really mean by low paying) - you can experiement with different types of ads. Just some thoughts