I'm about to open a founding-100 free launch for vevid (a tool that turns a product URL into a launch video), and getting people to try it free isn't really the issue, that part's been easy enough. I don't know the next step though. going from people willing to use it for free to people willing to pay once the free spots run out. did you charge from day one and just accept the slower signup curve, or run a free phase first and convert after? and for anyone who converted free users into paying ...