If you had a choice between two seemingly all-knowing chatbots, and one of them kept trying to sell you things in the middle of your conversation, which one would you choose?
There will be some disclosure somewhere. For instance, maybe it will be a slightly different color or you could hover over it to see the source.
There's a myriad of ways to avoid that problem and make it socially seen as equivalent.
Then you'll have ad blockers removing sentences. This seems obvious and inevitable - a two sided marketplace with easy capitalization opportunities; it'll fit right in