Luncheon vouchers?!?!

I know it's churlish to complain when people pay you, but I've literally in my life, in 31 years of living on planet earth, I have never even seen a Luncheon Voucher. I thought they died out in the 80s, but I'm here with £14 worth of 50p luncheon vouchers. I don't know if I have to use them individually or all at once, but it's just weird.

Why if you were going to pay someone and offer them a voucher, wouldn't you say have an Amazon voucher? You know, they don't cost any extra to send out and they can be emailed, used everywhere, or at least offer a choice. You know, would you like PayPal or a high street voucher at play.com, but just to send out Luncheon Vouchers?

It's a bit weird isn't it?