I remember when the better credit card had a 350 WS$ signup bonus and was World MC, not World Elite MC. The change to World Elite came with promises of improved card features that never materialised. At the same time, the fees for merchants went up, because a customer paying with a World Elite card often costs them a higher disagio than a World card customer.
That may all be on the RBC side. I don't know how much WestJet is involved in these things.