The people who built it. The "employee" demographic trickled in later, though it now seems to dominate.

blumkvist's businessman/worker point is something worth keeping in mind when you see people behaving badly here. Back when this was a small group of entrepreneurs, it was all about building each other up and helping. Now that it's mostly people with no skin in the game, it's more about tearing ideas down.

(Note that in both cases, it's an attempt to pull people towards your own camp.)