I would be interested if:
 
1. the card never asked for any identifying information. So like a standard gift card, but pre-registered, turn-key
2. I could use it for either credit/debit purchase and/or ATM withdrawals
3. There was no fraud-detection protection built in.  It's swipe and go.   I wouldn't want to get annoying calls saying "the fraud detection unit thinks your purchase of 100 Thai whores isn't a legit purchase, please confirm or deny so we know if we need to cancel the card."   
4.  No limit (or a very high limit), nothing retarded like $500