Credit Card Rewards Are Heading Toward a Crisis - WSJ

“High-FICO cardholders on average earn money with the use of reward cards while low-FICO cardholders on average lose money,” they wrote. Overall, the study found that rewards cards drove a $15 billion annualized “redistribution” from low-score to high-score consumers.

In other words, poor people are the ones paying the rewards bar tab for rich people.