In the aftermath of the David Dao dragging incident in April, several airlines revamped their policies around paying denied boarding compensation. Delta authorized gate agents to go up to $2000 in compensation, and allowed supervisors to offer up to $9950.
I’ve never heard of anyone receiving anything close to $10,000. Involuntary denied boardings are exceedingly rare already, especially on Delta. When they do guess wrong on overbooking customers usually volunteer their seats for a few hundred dollars.