So I was looking for a flight on Delta.com and I came cross this message.
"Crossover Rewards program ending on 7-15-2018"
The terms on Delta.com sounds like this program is really ending for certain, but if you go to marriott.com it states, more information will be shared before July 15 (see below) not its being discontinued
ARE THERE ANY CHANGES TO CROSSOVER REWARDS™ WITH DELTA SKYMILES?
Crossover Rewards will continue through July 15, 2018, with all current benefits being honored through that date. We expect to have more to share on this program before July 15.
Thanks to Marriott, no more one Starpoint for every dollar spent on eligible Delta flights. Priority Check-In, Priority Boarding, Unlimited Complimentary Upgrades and first checked bag free for Spg platinum members
why is Marriott not being honest? another devaluation for SPG members