If this works, that’s very interesting and potentially very useful.
- International Prepaid Card: Supported Countries even include China, Turkey, Turkmenistan. Feels rather unlikely. Is this actually tested well? Or you just listed countries where in theory this might work?
- What if that 3-D Secure thing is required?
- To test this for a small amount like $5: “Total fees: $5.14 ($5.00 + 2.50%)” means I’d pay $10.14, i.e. fees are 102.8%, higher than the card value itself?
Not a recommendation but I too trust Disroot pretty much. You can get a custom domain there without “buying a paid plan” once you make a donation. Would that be an option for you?
Using multiple providers (having multiple accounts) is a good idea, though. Don't put all the eggs in one basket. I’ve never heard the two providers you mentioned, so I can’t tell. If you can sign up anonymously via Tor, if they’re Google-free + not behind CF, and (most importantly) if you feel them “good” (subjective but gut feeling…), I think they’re usable.
If their support use PGP, that’s a good sign too. (Proton even doesn’t share its pub key iirc.) If they also accept the privacy coin like Disroot and Tuta do, that’s nice too. Ultimately, though, believe your gut feeling, because everyone has different priorities, different threat models, etc.