If you guys have that much traffic I’d definitely move to something more scalable. You should check out Microsoft Azures version of OpenAI. You’ll have to apply. The application is free. They will ask you about your company, what you are trying to do, etc. I got approved in a little less than a week if I remember correctly.
Azure OpenAI Service – Advanced Language Models | Microsoft Azure
I don’t know if OpenAI intends to be an AI service provider or just a research company. But I would definitely recommend getting onto something with higher availability if you have that much usage.