Earlier quoted context omitted.
This isn’t an AWS product, it’s Amazon (the non-AWS side). I don’t think this has anything to do with AWS billing. AWS already has Amazon Q, which is its chatbot offering for AWS customers.
I'm sorry? https://aws.amazon.com/ai/generative-ai/nova/
Amazon Nova Chat is a different product that uses Nova, buts it not AWS. Notice that if you try to use Nova Chat, you log in using your Amazon.com account and not an AWS account.