Earlier quoted context omitted.
>The conversational UI is a lot less convenient to include advertisements How so? Surely people are going to ask this thing for product recommendations, just recommend your sponsors.
This moves the advertisement opportunity to the chat owner. If you want to use chat (+api) to book a table at a restaurant, then the reservation-api company loses a change to advertise to you vs. if you used a dedicated reservation-web-app.
Honestly I see this as a positive change, I'd rather be the customer than the product.