Having to pay to visit all of the sites out there which are currently using ads would pretty much ruin the internet for most people. Having a big banner at the top asking for donations seems to work rather well, though. See gnu.org and wikipedia.org for examples (though Wikipedia's donation campaign this year is a bit excessive IMO).
Doomed to fail since Google takes a chunk and it still leaves all the content available to anyone with adblock. It'll get some small use I'm sure but not enough to be notable.