LLMs are great for product research, as in "I want to buy X, what brands are there and what are the pros/cons and what do users report".

Lots of potential to game the results there. If that is enough to sustain the business is another question.

They are only great right now because, unlike web search, results are not yet sufficiently gamed and monetized.

There was a time, in an age long gone, when a cursory web search was great for product research too.