I’m sharing this in case it helps other users who rely only on a debit card.

I purchased the AI Power Pack bundle and tried to redeem the Gumloop Solo Plan. My Visa debit card worked when buying the bundle on AppSumo, but the same card was repeatedly declined on Gumloop’s checkout page, so I have never been able to complete redemption.

AppSumo support issued several new codes, and each code applied correctly, but the payment step always failed with the same decline error. Gumloop support explained that they cannot change their payment gateway’s card acceptance rules.

I’m posting this not as criticism but to note a structural issue: a card can succeed on AppSumo but still be rejected on a partner site, making redemption impossible for users without a credit card or PayPal.