My attempted charges on Oura have been failing since Friday and this was an Oura 4 not an Oura 3. I have no idea what they are doing over there. I've tried using Google Pay and Paypal in addition to entering the card directly. The $1 test charge always goes through but then the purchase fails. Oura tech support didn't have an answer. Since the purchase fails regardless of the card processor I have to assume it's Oura themselves blocking the order, as others have observed on the Oura 3. This rollout is a debacle.