With issuers dangling bonuses like $100 cash back just for signing up, it can be easy to lose sight of exactly how rewarding (or not) credit card rewards truly are. You may be asking, why should it matter? It's true that many people think of credit card rewards as "free money" they get for buying stuff they would anyway. Even a small reward is better than no reward. But there are a few flaws with this line of thinking.