A startup can be a healthy business with revenue -- of course -- but 37 Signals is not a startup. 37 Signals is a business in the traditional sense; they're focused on generating revenue instead of an exit.
I see what you're saying and I agree that they're more of a "lifestyle business" as defined in this thread. They're not the traditional type of startup, but they do share startup values to an extent.
What I'm getting at is that 37 Signals, while they might complain about competition, probably isn't all that concerned because they have a healthy revenue stream. Their revenue may be taken away later, but they'll be able to deal with that the same way they dealt with no revenue when they were just starting: making something people want and straight-up selling it to customers. In the meantime they're making bank.
Sure, but so does a guy with a lemonade stand. It's being able to grow and replicate that.
From wikipedia:
"Lifestyle Businesses are businesses that are set up and run by their founders primarily with the aim of sustaining a particular level of income and no more."
And that's great if you want to create a business that sustains your lifestyle.
Orange Julius and Jamba Juice are both basically glorified lemonade stands. Starbucks is just an upscale version of your gas station's coffee dispenser.
Sure, but my original point was that they don't seem to want to grow. They don't seem to want to be a chain of lemonade stands, they just want to be their own profitable lemonade stand. Which is great and fine, but it's perhaps not aligned with many of our aims.