With the economy in a tailspin and a gloomy outlook, there is a renewed focus on sustainable business models for startups. One model that has come in for particular scrutiny is “freemium” with posts such as Is Freemium Really the Way to Go? and Freemium is Not a Business Model. But not everyone has given up on it. I just had a conversation with Dave McClure where he said that he has been thinking a lot about where to draw the line between free and paid features in the freemium model. A while ...