Other funding sources fail on the current market because they're competing with content users think is free. But if browser developers remove the option to pay with privacy, that competitor is removed. Google is one of the companies positioned to make that happen.

It's true that people will probably still only pay for things that provide them significant value, but a) low-value content is one of the biggest problems on the internet, so putting those companies out of business is a great result as far as I am concerned, and b) search is obviously high value content, so Google has nothing to worry about.