Yes, I did come across that. However, the answer was given by someone with a US PR card. That means he can enjoy the same privileges as US citizens, the same way I enjoy the same privileges at customs as Canadian citizens. He mentioned that he scans his PR card, which means the NEXUS is somewhat irrelevant. If he only scans his American PR card, what do I scan? The Canadian PR card? Then what's the point of the NEXUS card? Also, I no longer have an I-94, my last travel to the US was March last year.