No, they didn't. Don't believe their initial lies. They aren't even trying sell that load of excreta any more.
OK, fair enough. DOT rules for overbooking still apply whether or not more tickets were sold than seats or if the seats were needed for crew or something else. Anyone who flies a lot will know about weight and balance issues, runway condition issues, heck...even the temperature.
It’s harder for planes to climb in hot air than in cold air.
Air density plays a role in determining allowable take off weight.