Dollar's strategy of using flat rates for corporate codes rather than percentage off rates like most other rental companies always bewildered me. If cars are going for $80 per day because of high demand, I can understand using a code to knock maybe $10 a day off, but cutting the rate in half? That makes no sense. It also makes no sense because in lower-demand periods where cars are $20/day, the corporate code is useless, since it returns a higher rate.