Millions of Americans promise to lose weight every January, but in February, that couch and these cheeseburgers start to look good. If you need a little extra motivation this time, how about a cash incentive? There is an online game that pays players to lose kilos. It has been a godsend for Houstonian Nick Alvarado. "You do not feel worthy, do not feel attractive. You feel like you should be out on the side," Alvarado said. "To save my life and keep my health costs, I have to do something now." Alvarado, 42, has struggled with weight for years. His parents are diabetic and weigh over 300 pounds. I knew it was a matter of time before developing diabetes too. With two young children, Alvarado decided he had to make a change. "I was kind of looking for something to motivate me some. A kind of game to make it competitive," Alvarado said. While searching the web, she found a called Dietbet.com site. Founded two years ago by Jamie Rosen, weight los