Google (sort of) used to offer this feature! https://en.wikipedia.org/wiki/Google_Contributor https://en.wikipedia.org/wiki/Google_Contributor You put money in

Google (sort of) used to offer this feature! https://en.wikipedia.org/wiki/Google_Contributor https://en.wikipedia.org/wiki/Google_Contributor You put money in your account and basically bid against the ads that would be shown on websites you visited. I think you could even pick the images you'd see instead of ads.