Hi, I can see you guys are still facing issue? Till OpenAI fix it, why dont support each other. One can help other if someone has CC working with OpenAI, You can create a one time virtual CC number and give other and other party will pay you back, may be add extra $1 or $2 for favour. Count me out for sure 
. Can someone confirm whoever have successful payment with the card can again make the payment. Because first payment goes smooth most of the time, only from next payment you will need hell lot of sec and auth check. So my guess would be whoever succeed can you try with like $5 or $10 once more. I can remember PayPal or Stripe will ask you to make the account from second payment. B/W what is stopping OpenAI from using PayPal ?