Then it sure sounds like what they have is a proof of private keys algo, and not a proof of coverage algo. In which case why bother with a blockchain at all if there's a singular central entity that is the arbiter of all trust?
At first glance it might seem like that but the hotspots are measuring signal from eachother and are rewarded accordingly. The Proof of Coverage comes from actual measurements of RSSI against distance and power variations.
This is one of more interesting parts of the Helium network. It's wholly not forkable. Helium hotspot owners get their firmware updated automatically... which again seems like a big negative (single company controlled hardware) but it's imperative for this stage of network bootstrapping. I want Helium to tightly control quality now to get to a level of resources where trust itself can be disaggregated amongst DIY hotspots and firmware developers.
