There are already several established organizations that hold and manage billing for data sets within specific domains. An example is the LDC (https://www.ldc.u

There are already several established organizations that hold and manage billing for data sets within specific domains. An example is the LDC (https://www.ldc.upenn.edu/ https://www.ldc.upenn.edu/) which hosts huge amounts of natural language + voice data in many languages, submitted by universities around the world. Personally, I think there is a big downside to attaching it to billing. The process is quite difficult to obtain (financially and logistically), especially if you are outside a university. Even within a university, procuring data could take months of bureaucracy. Also as an independent student or developer, this data becomes largely inaccessible.