He's not arguing that the price should be less than one cent. 10 mills is one cent. He's arguing that "micropayments would work if you charged mills and not cents, and that's why you should charge a cent".
People really hate the idea of pay-as-you-go for online information. It's not just about pricing, it's about monitoring. You would need a central or aggregated service so could see your costs in real time, otherwise people would be getting huge bills at the end of the month.