My friend who spoke with the dealership salesman this past Spring was told that they weren't taking ANY customer orders for new 2021 C8's and the salesman gave him your explanation as the reason: they'd sold some 2020's (one? two? ...unknown...) and the buyers flipped them for a ++ profit and the dealership was worried the same could happen with 2021's. My understanding is that the dealer and person who flips the C8, only gets penalized/"blacklisted" (respectively) by GM if the car ultimately ends up going from Canada to the States...since it jeopardizes GM's relationship with its US dealers/market. So a Canadian flipping to a fellow Canadian attracts no consequences.
Sorry but I don't buy that explanation; I think it a convenient rationalization to justify shutting out ALL customers and making a ++ profit for the dealership.
If that explanation was sound/reasonable, then ALL dealers would refuse to sell to customers using the same logic. However, Wheaton Chev in Red Deer is the ONLY dealership I've heard of in all of Canada, following this practice. Don Wheaton Chev in Edmonton (owned by another Wheaton brother) doesn't run its business that way...nor the other dealerships in Edmonton, nor Calgary, nor elsewhere to my knowledge. If they did, my friend and others I know (buying from Edmonton and Calgary) wouldn't have been able to buy a 2021 C8 at MSRP and all potential buyers would be held hostage by dealers making ++ profit. Imagine a world where NO ONE could order a new vehicle from a dealership but rather had to buy it from a dealership only when the vehicle was there, at way over MSRP. That would spell the end of dealerships and everyone would buy direct from the manufacturer...
Thankfully the "C8 craze" won't last forever and people have long memories. My 2 cents.