How is filling people up with soda going to make them buy more food? Honestly, I think free refills were invented because soda is cheaper than the fast food gu

How is filling people up with soda going to make them buy more food? Honestly, I think free refills were invented because soda is cheaper than the fast food guy's time filling your cup. Therefore, they moved the soda fountains to the dining room and just started handing out cups with meals to save money.