She has a reputation for being abrupt and impatient, but Nahji Chu is a survivor who’s built a flourishing Vietnamese food empire.

For a steep price, the original premium card gives you 5X points on certain flights and hotel stays, hundreds of dollars a year in credit for travel and shopping, and a suite of perks for high-end ...

This student card earns 2% cash back on up to $1,000 per quarter in combined spending on gas and at restaurants, plus 1% on everything else.