Originally Posted by wingsfan
if the incentive is not big enough we'll just go more to our favorites, or other dining programs like Diner's Club
Actually, Diners Club now (since a couple years ago) is the SAME dining program, just under a different name. Their Restaurant Savings program is simply a no-additional-fee (beyond whatever your annual fee for Diners Club is) version of the cashback iDine/Reward Network program, except that of course it only works with the subset of iDine restaurants that accept the Diners Club card (and for some strange reason, not even nearly all of those).
It was only before a couple years ago, when Diners Club program was instead affiliated with Le Card, that it was completely separate from iDine.