Hi,
Follow up to our earlier chat - I chased with Vini and he said that promo codes were not actually being considered on the Stripe side. I've tested and I see the same.
I: (i) started a new application, (ii) added the "TEAM" (100% off) code to my account - looked fine in Admin, (iii) finished the application process inc. adding card details and then (iiii) approved my application in the backend.
When I checked on Stripe it shows I was definitely charged, and I don't see the promo code in my now active test account.