Back in October 2010 American Airlines and WestJet teamed up on interline service, allowing for easier connections and ticketing options for passengers. That deal allowed for transfers only at the Canadian connection points between the carriers and didn’t cover frequent flyer reciprocity. At least the frequent flier part of the deal has finally been addressed.
These points do NOT qualify towards elite status.
There are at least four fare buckets – R, S, J and U – which are excluded from earnings. I’m guessing one or two of those might be for award seats but it seems unlikely all four are.
So, like always, keep an eye on the fare classes when booking, but also look to earn with a new partner.