Fees are always higher if you compare internationally available products with EU-only products, this works for basically any such platform. The economics of international USD cards is quite different, and the fees reflect that.
Where can we see the list of all supported countries for all cards, and are both ADV Global and ADV Crypto World cards accepting and holding Bitcoin and crypto with your advcash wallet or not?
ADV Europe cards are for the EU, Turkey, Israel, other cards are for all countries supported on the platform. We do not publish these things as lists.
The easiest way to understand all this is to have an account and see the options in it.
We do not have crypto wallets on the platform, so you can't hold crypto with Advcash wallets or cards. Cards are issued in fiat, as are all cards in the world so far
What you can do is sell crypto to get fiat balance in Advcash (also referred to as a crypto deposit) that you can later send to any ADV card you may have. The Crypto card also has a stablecoin load option, described in more detail in the account.