There is an old adage about if it were raining pennies, only a fool would turn his umbrella upside down because pennies have such little value relative to the risk of breaking your umbrella.
Well, goldpoints may have little value but I am set up on auto transfer so what the hell. I don't eat at Friday's too much but when I do I give them the number. I have bough a few shirts from Lands' end, Paul Frederick, etc.