Google tried something like that called Google Contributor back in 2017. You could basically just put money in an account, and instead of advertisers buying ads

Google tried something like that called Google Contributor back in 2017. You could basically just put money in an account, and instead of advertisers buying ads for whatever site you were on, it just took that same money from you and gave it to that site. Honestly a pretty elegant system, but I can kind of picture why it wouldn't have worked out.