I don't think I'd publish on a blog if I knew it would be consumed entirely from an LLM. Even if I don't want money, I kind of want people to know that I wrote it, they're my ideas, and I don't want them taken out of context.
From the look of the examples they use at least sites like TripAdvisor, which I'd assume would like to have people go to their site.
For services like rail companies, restaurants and so on, I can see them not being bothered, because they make their money offline. Blogs, and pure content sites might not be to happy about their content being used to prop up OpenAIs business, while getting nothing in return. If anything it seems like OpenAI is actively trying to get sued.
The whole interface and functionality seems really nice and a clear improvement for the users, for certain types of queries at least. It assumes that OpenAI has made their LLM stop lying, and that they can get the required data legally, but it doesn't seem like anyone cares about those details.