If it's like the commercials in the movie the Truman show I think this could be a nightmare.

I think it all boils down to how (if?) this will be transparent to the user.

If the response suggests a sponsored product/service to the user it could either be the specific product/service that ChatGPT is biased to suggest or the whole idea of using a product/service. As a user I would like to know both of these biases to understand that using any product/service for my need might not even be the best thing.