I dont get the proposition, they want to build DCs in partnering countries to run GPT on? Who is this useful for, except for OpenAI to get lower latency connections to their customers?
Not latencies, think data privacy / keeping queries and data from leaving sovereign borders. This way, if there is some local instance / everything is local than the datacenter and service are subject to local laws and regulations (and alternatively you're not subject to foriegn the laws and regulations (and agencies).
How can one audit that the bytes going from a DC in country A to a DC in the US is not the user queries but some telemetry data for example? Presumably you don't get to look at the unencrypted packets