Just noticed the banner on Cashrewards.
(1) Cashback is ineligible on purchases via The Card Network (TCN) App.
(2) Cashback is ineligible when using codes not listed on Cashrewards.
(3) You must return and click through from Cashrewards every time you make a new transaction/purchase.
yup, same here - don't know how they ran out of digital gift cards, but i managed to buy 1 that was tracked and came through to my email. wonder if they will end up back in stock at all today