I also don't see anything new or special about hackpad from Etherpad. Is it simply valuable because it has a user base? How is it that a startup built on open s

I also don't see anything new or special about hackpad from Etherpad. Is it simply valuable because it has a user base? How is it that a startup built on open source product is more valuable just by having more users? I fail to see anything special about Hackpad.