Getting back on topic, on my September 19th WN 2068 OKC-LAS, I attempted to use my "expiration date-less" drink coupons with no success. The FA suggested I mail them in a letter to WN asking for replacements under the new system, especially if they were ones bought at the gate when the cashless cabin was implemented. Now to go off topic, I did use my new RR 2.0 coupons for a triple Jack and Diet Coke and was rewarded with 1 unopened can of Diet Coke, 2 cups of ice, and 3 unopened bottles of Jack Daniels. An hour later, I repeated the order with the same results, while also using the remaining 2 RR 2.0 drink coupons for my row mates beers.
For my return flight last night, WN 1222 LAS-OKC, I did not attempt to order any drinks due to having to drive home after landing. Also, the flight went out with 70 empty seats on a 73G, which is very unusual for that flight no matter what day of the week.