How often do you filter low paying ads?

With www.adsblacklist.com I generate a list of low paying ads every month. How often do you filter it for your site?

 

The limit to filter ad is 200, I think its more than 2000 MFA sites around there..

 

i did the adblacklist thing and got my 200 addresses....but new ones pop up every day it's almost impossible to keep up with them. I try to check my ads once a week and see if there are any sites worth blocking. Of course I have to remove a site to do it -- catch 22

 

there is no exact time for this . my mfa list is full now . when i see a mfa site on my ads , i change my filter

 

I chekc it every few months when i thin my earnings are dropped considerablly.

 

oh thanks for the information because i never change mfa list before ...just only when 1 put in the 1st time