The thing is, not all of them are clear about this. So the only sure way is to try the particular card, unless it is mentioned on their website.
Btw do you by chance know an exhaustive list of available crypto cards?
You can ask the support team, and if the answer is not convincing, ask here using the name of the card. You will inevitably find someone who has used it or knows someone who has used it.
The list mentioned above gives you all the available services, but unfortunately for these cards, the things related to them are updated monthly, and you will not find an updated list.