I think the prepaid cards are extra thin, maybe that's a problem for the MSR?
I don't think that's the issue. I can read the info from the card as well as delete the info from the card. I tried two of these cards. They are thinner than the plastic cards, but if I can read and delete info on the cards, shouldn't I be able to write info to it as well?
All UK cards have to be activated at the till
These cards would need to be activated at the till as well. A person would need to actually shoplift the card, then peel off the scratch-off sticker to see the PIN, then place a new scratch-off sticker over the PIN, then return the card to the store(reverse shoplift), then wait until someone buys the card so that they could use the card. The PIN would be needed to use the card. This is only a $50 card and really wasn't the best example.
Alternatively, I think a person could just lift gift cards, make copies of the cards using a MSR, return the gift cards to the store, wait until the cards are activated, and then use the cards at the store. I think this would work. I've actually noticed similarities on the back of cards, not even under the scratch-off, and the digits on Track1 and Track2. I have a nice write up I'm doing on this. I may post it here.