I picked up my CoPR today at an embassy (visa-exempt country) and I asked about the whole eTa thing. I was told that there will be information about my PR when they scan my passport before the flight. Think about it. Those with stamped visas on their passports from visa-required countries do not need eTa. CIC definitely thought everything out, it wouldn't make sense or be fair that we would have to apply for an eTa. Even if it's quick and cheap, we are not supposed to do any extra steps. You get instructions with the CoPR that do not say anything about it either. So don't worry and let us know after your flight about how it went.