The problem is that, as soon as they start charging, they open themselves up to liability. That's actually exactly what your bosses want: someone to take the liability.
The Windows XP EULA states "Except for any refund elected by Microsoft, YOU ARE NOT ENTITLED TO ANY DAMAGES, INCLUDING BUT NOT LIMITED TO CONSEQUENTIAL DAMAGES, if the Software does not meet Microsoft's Limited Warranty, and, to the maximum extent allowed by applicable law, even if any remedy fails of its essential purpose."
It goes on to state that the only remedy offered is your money back. Mozilla also offers your money back, all $0 of it.
Or, to flip it around, beggars can't be choosers, and since they're executives...