When I eat out, I'll choose a restaurant that offers RN points. I look at it as advertising expense, no more, no less. Its better than advertising, since RN only profits if the restaurant profits.
Plus, we're in a recession (well, maybe, kinda, sorta, or maybe not). People who are looking for a reason to justify the cost can use RN. It creates demand where before there was none.
Its a good thing.