The best clear example I've seen of LLMs making money is a company that now generates custom email text instead of using standard email templates. They increased engagement by some meaningful metric like +15% which translates into hundreds of millions of dollars in revenue.
I know the original email was something like "Alert: you have a new thing: X Thing"
And the new emails are a prompt something like "we know all of this about the user and all of this about the X thing, write an email alerting them to the new thing with these particular goals".
I really don't know much about it so I'm being pretty vague and generic.
