I'd love to hear back from your customers that have gotten them to work tbh, I've spent $200 testing your cards so far and every single one of them has instantly suspended for 'Suspicious payments'.
I'll also add I've set them up on fresh RDP's with anti-detect browsers and 4g proxies, so it can only be the payment method that is the issue. I'd understand if they were thresholds but I'm making prepaid accounts for my own legitimate use and they still insta-suspend.
I'd advise taking 'Working for adwords' out of your title/description because as it stands it's completely false advertising.