Ask HN: Single Person startup/company?

Pinboard's numbers* were just realeased, and that made me curious. How many of us currently run a single-person company? By company, I mean something that generates (or is intending to generate) revenues. Side projects count. Three thing I'm most curious about - growth in user base, revenues & profitability over the years. If you can share numbers, that would be fantastic. *https://news.ycombinator.com/item?id=12059965