As an engineer, I have to manage the cost/service ratio manually, making sure I charge enough to handle my traffic, while enforcing/managing/policing the usage.
Additionally, there are customers who already pay for OpenAI, so the value add for them is less, since they are paying twice for the underlying capabilities.
If OpenAPI had a billing API/platform ala AppStore/PlayStore, I have multiple price points matched to OpenAI usage limits (and maybe configurable profit margins).
For customers that don't have an existing relationship with me, OpenAI could support a Netflix/YouTube-style profit-sharing system, where OpenAI customers can try out and use products integrated with the billing platform/API, and my products would receive payment in accordance with customer usage...