People are weird about prizes, awards, or perks.
I worked at a place where a group of employees had a lotto pool. You had to pay every week and I kept tally of the contributions (I didn't contribute and was the office manager, so I was reliable and trustworthy.) When they won a sizeable jackpot, one of the regulars was on vacation and hadn't contributed. She tried to sue all of the others for her supposed share because she had never missed a week before. Alienated the entire staff and she ended up quitting over it (and got nothing for her trouble). The manager, who was part of the winner's circle gave me $100 for managing the books. I was tickled because I wasn't expecting anything. When I told friends, most people would say, "THAT'S IT?! They should have given you at least a thousand!" It was $100 more than I had before and a little presumptious for my friends to be so generous with other people's money.
I once won a 50/50 raffle at work and was going to buy everyone a coffee. Before I had a chance to take orders, or even tell people I was going to cover the bill, a co-worker announced on the PA system that coffee was on me that day. I was so put off by the presumption, I bought nothing. For anyone.
Would it have been rude for Sally to respond to Presumptor, "You misheard, I was given these cards as a thank you to me for arranging today, not to re-gift."
I would rather be generous of my own accord, rather than being ordered, shamed, or coerced into giving. It takes away the joy of giving, in my opinion.