>>> Github Well, it worked out for GitHub because: 1) they have a great product and everyone can see how great it is, without signing up; 2) because of the n

>>> Github Well, it worked out for GitHub because: 1) they have a great product and everyone can see how great it is, without signing up; 2) because of the nature, the word spreads exponentially. One free user can spread the word to literally tens of thousands of potential paying users. So GitHub is in a rather unique position.