Gift cards. How it works?

Question

Does anyone know how gift cards work?
How to buy them?
Why are they sold cheaper?
How should I use it? Is it possible to make money from this?
Do you know where you can buy a gift card without risk?

Answer 1

simple money laundering from black and gray markets

Answer 2

Hey man, people say different things about this. I don't really understand why you would use gift cards, but some of the ideas seem reasonable to me. Like selling products online at very low prices. If you have a knack for business, you could make something out of it.