At the time, potential Series A investors wanted to see a business model that showed how LinkedIn would get to profitability. I told potential investors that we weren’t going to generate revenue until after the next round of funding, and that therefore it shouldn’t matter to them. They insisted anyway, so the team and I generated a financial model that included revenue sources. I don’t even remember what we put in it! Rather than waste weeks on it, we simply set aside a single evening, drank a couple of glasses of wine, and put together the model (I might have been a little miffed at having to spend even a single evening, but it was pretty good wine, so it wasn’t a total waste).