Its Good to see that people are becoming more aware of this, I Got ripped of by a very similer scam 2 years ago, something over the slot to stop the card coming out and a very Legitimate label saying due to upgrades you need to enter your pin twice, but because the card is in this holder the cash machine shuts down, keeping your card, you walk away

and they come along take you card and before you can cancel your card they empty your account, i was lucky the bank refunded my money eventually, But have i learned to check the cash machine before using it.