> Showing the snippet makes people more likely to click through, not less. If you aren't a copyright maximalist, how is that not good for both aggregator and news site?

Exactly. But publishers still think they're in the 20th century

This isn't true if you realize what sort of "snippets" they are trying to deal with. Google has been scraping content for Knowledge Graph, and offering up "the answers" so that users don't click through any links. So Google rips off other companies' content, and has basically said "if you don't like it, feel free to block Google with robots.txt and get delisted from search".

So Google has left the option that sites either give Google their content for free, and go out of business, or get delisted from search entirely, and go out of business.

https://theoutline.com/post/1399/how-google-ate-celebritynet... is a pretty good example of why this is happening.

I've literally never seen one of those knowledge-graph snippets relating to current news? Google News now has stopped showing teaser texts for news for some publishers after a similar German law was passed, but "surprisingly" the majority of publishers preferred to allow Google to show teasers... (Which is why there's now talk of forbidding publishers to grant that permission for free)