So without changing my shopping habits at all, I get given money. Any similar opportunity should be welcomed.
They're pretty useless to me as well. I never shop at Sainsbury's - I have a Tesco Privilegecard after all - and the majority of my railway journeys are spontaneous, so you're not the only one here.Yeah I think plenty of people have made that point now.
They are worthless to me, and most people I know, to make it clear, which is what I probably should have said at the beginning.