There was an effort https://en.m.wikipedia.org/wiki/Google_Contributor https://en.m.wikipedia.org/wiki/Google_Contributor which worked very well: you set a mont

There was an effort https://en.m.wikipedia.org/wiki/Google_Contributor https://en.m.wikipedia.org/wiki/Google_Contributor which worked very well: you set a monthly budget just like advertisers, and you participate in the bidding of ads on the website you are visiting. If you win the bidding, the ad will be replaced by a static image. Sadly this was turned down and the new version of Google Contributor only works on some websites.