Earlier quoted context omitted.
So how is it revenue? Sounds like a liability
Companies bet on something like 2-5% of "breakage". That is the main profit motive behind gift cards. There are various claims of using them as marketing and a system to refund people without letting them out of your loop, but the major reason anyone pays what they do to a certain company to sell gift cards (almost nobody does it themselves anymore) is to get that breakage profit. Gift cards are a subsidy from forget…
I don't think it's a crime to give a gas-station card to someone who drives a lot, or a popular restaurant to someone who enjoys eating out, or a Google Play card to someone who owns an Android phone.