Their reasons was: "If you are wondering about using a p-Chip instead of an RFID tag, the former boasts several advantages. According to the maker, p-Chip devices are smaller, cheaper (a few cents each), tougher, and more secure than nearest competitor RFID."
I don't claim to be sufficiently versed in these fields to critique, and I'm not trying to start an ideological war here, but I felt it important to highlight that legitimate companies in America continue to explore its use cases.