Jason Fried has a good reason why you should ditch your free plan

“… The majority of the revenues for our products come from people who sign up for the paid versions upfront. So we definitely have people upgrading from free to paid, but the majority of people who are on pay started on pay... of course, more people are going to pick the free version and stay on the free version, but if you’re looking to get paying customers, ask for money upfront and you’ll have a lot better shot of getting them.”

- Mixergy Interview @ 6 minutes