Here's the fine print. Starts September 30th and ends October 11th.
For every donation of $2.00 or more made through September 30th, 2017, Habit guests will receive one free Charburger with cheese certificate. Certificates can be redeemed in-store beginning the next day, through October 11, 2017 at participating Habit Burger Grill restaurants. Limit one free No Kid Hungry/free Charburger with cheese certificate per guest, per day. Promotion not applicable at LAX, GCU, USC, Reno, Santa Barbara, Lompoc, Buelton, and UAE locations.