The problem with this is that there is no incentive to keep one account. GoMockingbird (http://gomockingbird.com http://gomockingbird.com) is an example of an

The problem with this is that there is no incentive to keep one account. GoMockingbird (http://gomockingbird.com http://gomockingbird.com) is an example of an application I probably have 4 accounts for-- not on purpose, I just couldn't figure out which email, twitter, facebook I used to sign up for it. I didn't realize that only the first project was free until later, because I generally stop using it after one project. I could totally foresee a user signing up for 5-10 free screens then forgetting about the tool for later. When they come back, those original 5-10 screens may or may not be related to what they're working on now, and I can guarantee most people won't shell out the $39 when they realize they could just create a new account. The proper way to monetize this (IMO) is through a freemium model. Don't limit them with what you have now. Figure out something that's truly a solid bell or whistle and sell them that. Give users the ability to create HTML/CSS for free, but maybe scroll-fixed javascript headers cost $10 for 10 pages (scroll here: https://www.kiteedu.com https://www.kiteedu.com).