37signals is doing what they like to do . . . and Mint is completely justified in doing what they chose to do.
Once a company grows to a certain size, things change. Some entrepreneurs can grow with the change. Some can't or don't want to. Running "a big company" is different than launching a startup and requires a different set of skills and attitudes.
Once a company grows to a certain size, things change. Some entrepreneurs can grow with the change. Some can't or don't want to. Running "a big company" is different than launching a startup and requires a different set of skills and attitudes.
Neither is wrong/better.