I don't read webcomics, and somehow I don't think people like gwern who write long-form content do it for the ad revenue. And even if there are ads on the website, if they respect the DNT header, AdNauseam won't auto-click them.

(I'm not sure what the tipping anecdote is supposed to mean, but I don't understand why US customers put up with tipping either, the business is responsible for it's operating budget, and there is no legitimate reason to bother the customer with it.)