Simply clever
edit: Skoda is a brand I’ve literally only heard of (from here in Australia) because they advertise constantly on the Tour de France every year. Their tagline is burned into my brain.
This is neither a good nor a bad thing. It simply is.
Theoretically, there’s nothing stopping any new country from joining getting a carve-out. You just need everyone to agree to it. And tbh, getting them to agree to let Canada continue using the Canadian Dollar is probably a much smaller ask than getting them to let a North American country into the European Union.