The chatbot can provide sponsored responses. Not sure how evident those will be, but I think it will happen. Surely is in Google's mind.
There are other ways to monetize. For instance small local AI models by default with option to pay to use faster/more efficient AI models remotely.
If the responses are sponsored, it seems the value drops dramatically.
I want the AI agent to act more like a fiduciary, an independent 3rd party acting in my best interest. I don't need an AI salesman interjecting itself into my life with compromised incentives.