Billing for integration in external app (3.5-turbo-1106)

Hello, I am interested in embedding certain models into a project of mine that may release. I am interested in two things,

  1. If I do integrate it into my application the user will need to make requests to the API at random intervals, at the moment I am unable to “restrict it”. Is there currently a billing plan for integration or do I need to contact sales?
  2. Regarding the Licenses of chat GPT, for commercial use, I am getting a lot of mixed information, can someone clarify? Thanks in advance!