Would you be miffed if someone bought you a holiday gift with their credit card reward points, or a gift card someone gave you, or something similar?

I have about $100 in reward points saved up and it'll really help me cut costs on Christmas shopping. However my friend seems to think that makes me cheap, because i am not *technically* spending any money on the gifts. But that's $100 I could have spent on myself. What do you think?