Given that 37 signals had been around for seven years when they took money from Bezos, you certainly can't conclude that they're not bootstrapped. Everything de

Given that 37 signals had been around for seven years when they took money from Bezos, you certainly can't conclude that they're not bootstrapped. Everything depends on how much money it was, how they used it, why they needed it, etc, but it does look like they built a sustainable business by that time.