Bonus 3,000 Alaska Miles for Hotel Booking via Rocketmiles Until 31st March 2018 (Targeted?)

Check your mailbox! A few days ago I received (targeted) promotional email from Alaska Airlines. If you never make hotel booking via Rocketmiles, until 31st March 2018 you will get 3,000 bonus Alaska Miles by doing so. This bonus applied on top of of the 1,000–10,000 miles you earn whenever you book you hotel with …