DAL has watered and fed Alaskan for the last few years. They are flying our customers under the 'exclusive codeshare' deal. I guess the 'exclusive codeshare' is not so 'exclusive' anymore. Guess who Alaska signed up with to channel passengers to? Emirates! Alaska will now be supplying passengers to Emirates on their SEA-DXB flight. They are mainly targeting the Indian tech workers with this move. Emirates is hoping to get SEA-India passengers to fly SEA-DXB-India... the same passengers we take from SEA-AMS-BOM! Here is the link:
Emirates and Alaska airlines launch frequent-flier pact for first Seattle flights - Puget Sound Business Journal

We keep feeding and codesharing with everybody and in turn get f'd in the rear end. We don't have product control over Alsakan or anybody else. We must do our own flying. We warned about stuff like this happening in this same thread several years ago.