I'm in the same boat, we are mandated to use Avis.

Although enough of us complained about Avis we now have an option for National. Sure we're just a small company with 2000 field employees, but we all found little value in free weekend coupons. Now if I've got to spend 20-30 rental days for a single free rental day.. That's even more worthless than free weekends.

I'm not sure how National's program works, but it's got to be better than this debacle.