Build something cool, give it for free, burn cash until the white knight steps forward with a huge check and the investors (and sometimes the founders too) laugh all the way to the bank. One could argue that this kind of madness does drive innovation while making a handful of founders and investors obscenely rich. Not a bad deal if you are not an eBay shareholder or ….
Btw, when is Google gonna start charging for Youtube? 🙂