My Barclay Ring Mastercard just sent a letter reminding me to use it in the next 60 days or to face closure. I am not sure when the last transaction was but it was before 5/2/18.
60 days later, Barclay did indeed close my Barclay Ring Mastercard. Got the letter sent from 9/5. So, it lasted in the sock-drawer almost 1.5 years before closing. I almost regret it but I don't use it so....