If you have some reference code for IOTA, I'd like to see it. I'm firmly against any type of closed source Infrastructure code, so I'm hoping that's the plan here. I would also mention that we're not QUITE there yet with this stuff, so over engineering solutions to be scalable to trillions of devices is probably overkill. Giving a simple IOT device a small wallet to pay for its infrequent API calls is probably doable with Bitcoin, even with transaction costs. For other use cases, I can envision proxy devices with keys that represent the smaller, low power, frequent transmissions.