Why would you use Bitcoin debit cards anyway? We have apps in our mobile phones for micro transactions. We don't need physical debit cards with high % fees.
Well how can you spend coins on your highstreet as nearly ever shop doesn't accept bitcoin. These cards just give you the option to spend your coins directly.
What's the point of paying with Bitcoin if you pay %3 to 10 fee per transaction? Bitcoin's slogan is send money worldwide with ALMOST ZERO fee.