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:D :D :D

>>> How does redemption for those work?

Works like your do. You buy them to a certain value. The other objections still apply, but you are not linked to a particular shop/chain.

Here, we have several "gift tokens" which are for a type of item rather then for a particular shop. A "book token" can be used in any book shop which is a member of the scheme, (most of them), same...