250 Bonus Starpoints when you use SPG Mobile Check-In for your Starwood stays

Have any Starwood stays coming up in the next month and a half? If
so this promotion is an easy way to score an additional 250 Starpoints
(750 Marriott Rewards points) on those stays! Simply utilize mobile
check-in for those stays and the points will be yours as long as the
hotel participates in mobile check-in!

Offer details

250 Bonus Starpoints when you complete a mobile check-in on the first
day of an eligible stay at participating Starwood Hotels Worldwide. Full details. Until Jun 15, 18

This offer is stackable with the current SPG global promotion where you
can earn 250 Bonus Starpoints per night for stays at participating
Hotels and Resorts Worldwide starting on your third night.  Full details, online registration and booking. (Registration is required)

Find many more SPG Bonus offers here.