What you sell is a digital service - connectivity. Your IAP product is similar to credits in most games available in the store.
The real goods and services that they prohibit are things like you, for example, in a store in a shopping bag, or if someone carries this shopping bag. They do not allow the sale of tangible things, only electronic ones. Items for sale must be transferred between two different devices.
I do not think that you can avoid in-app purchases for what you are trying to deliver from the app.
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