That's an exciting model when it works. But it's worth warning founders that choosing where to draw the line between free and paid is the life-or-death tricky

That's an exciting model when it works. But it's worth warning founders that choosing where to draw the line between free and paid is the life-or-death tricky part, and it's not always obvious. I wrote a fairly popular article about this: http://wensing.tumblr.com/post/25167979206/the-anatomy-of-profitable-freemium http://wensing.tumblr.com/post/25167979206/the-anatomy-of-pr...