Users that block ads have already shown that they aren't interested in the advertiser's message. It is then inappropriate for web-sites to charge for advertising to these users.
In any case, I agree that the all filtering products should contain an Off switch.
(From a competing developer:)
Users that block ads have already shown that they aren't interested in the advertiser's message. It is then inappropriate for web-sites to charge for advertising to these users. In any case, I agree that the all filtering products should contain an Off switch. (From a competing developer :)