I'm looking for the same. I need many $10+ cards that will work on sites that use CoinFlow (Usually used by crypto & gambling sites). Most of the sites/services here are for ad spend & subscriptions, and don't allow deposits to gambling sites.
Sites like Walden's per-card fee is too high. PrivCards & VyrionCard seem to be the same, but I feel sus about them tbh, so I haven't tried them yet cuz I'm not sure if I can withdraw the balance. Prepaid cards like MPV, Amex, etc rarely work nowadays. There were Prepaidy & Swype cards, but they are paused at the moment.
The only one that currently works for me is Rewarble. But their card issue fee is around $4+ minimum, and there are some high fees. A $20 card is gonna cost about $25, and that's the minimum. You can withdraw the card balance, but their fees are high. However, it's the lowest I can find.
Ohh, there's also Trocador, but they're not much better than Rewarble imo. $2 card issue fee, min $25, and some other high fees per transaction. Still looking for more & better options.