KEY POINTS
  • Credit-card issuers scrambling for customers have sparked a rewards war in recent years. 
  • For consumers who take full advantage, finding the right rewards card can be very profitable.
  • There are also pitfalls to chasing benefits and sign up bonuses, which can hurt your credit in the long run.

When Jeremy Steiner, 30, was ready to propose to his now-fiancé, Kaja Olcott, 29, he first made another commitment:

A new credit card.