I just saw this on Hetz's site. Looks like they are coping Enterprise
Hertz $14.99 weekend rates
For participating airport and non-airport locations in the U.S. (not including NY Metro and HI), Canada, Puerto Rico and Mexico, you can get a car rental for $14.99 per day (for Economy and Compact cars)
Valid for Thursday (noon) through Monday (noon) rentals
Unlimited miles
Valid through January 31, 2013
Check rates and make reservations here (use RQ code: FRDM)