In this case, Alaska is pushing people to book on their website. Regardless of marketing carrier, the more generous earning should apply, if purchased on AlaskaAir.com.

It's very clear from their marketing materials that is the intent.

https://news.alaskaair.com/global-tr...mers-hot-spot/Don’t forget: When you book a flight with one of our partners on Alaskaair.com, you earn at least 100% of the miles you fly. And guests with Mileage Plan elite status receive matching tier status within the oneworld alliance and all the benefits that come with it.