You’re a vegetarian. Everyone knows this. Yet every Christmas, grandma sends you a gift card to the Wild West Steakhouse or Crispy Chicken Rotisserie. Well, instead of filling another drawer with unwanted presents, you can now turn those gift cards into rewards points. According to MarketWatch, U.S. Bank and Plastic Jungle (an online secured gift card exchange) have partnered to allow FlexPerks Travel Rewards Visa Signature cardholders to swap select merchants' gift cards for much more appealing FlexPoints. So that $50 gift card to Hams-R-Us? Turn it into reward points and redeem them for travel,...