Recap: Save On Costco Membership, 70k Credit Card End Date, Marriott Give Away & More

If You Have a Costco Membership Expiring Between June & August You Can Renew Online Early & Save $5. Not much but every little bit helps, worth setting a reminder to yourself to do this.
Popular CNB Visa Infinite 70,000 Point Offer apparently expires March 31st, 2017.

Flights Booked with Citi Thank You Points + Cash do not Trigger Citi Prestige $250 Airline Travel Credit by Travel With Grant. Not hugely surprising that this doesn’t work as it needs to code as an airline for it to work and I imagine this codes as a travel agent or similar – but it’s still worth trying these things. You can view more about this credit here.
Marriott Rewards 3.75 million points give away. You can also enter by mail if you like. FOR RESIDENTS OF THE UNITED STATES (INCLUDING PR AND USVI) ONLY: Hand print your name, address, day and evening phone numbers, email address, Rewards Account number, and date of birth on a 3″ x 5″ piece of paper and mail it in an envelope with sufficient postage to “Marriott Mobile App Travel For Life,” c/o HelloWorld, Inc., P.O. Box 5029, Department 829846, Kalamazoo, MI 49003-5029. All mail-in entries must be postmarked by 31 May 2. Goodluck! Hat tip to /r/churning.