When people visit your startup, they should be surprised how few people you have. A visitor who walks around and is impressed by the magnitude of your operation is implicitly saying "Did it really take all these people to make that crappy product?"
Unfortunately, the number of people working for a company is a proxy measurement for whether it is successful. A wildly successful startup with only 1 or 2 people will be looked down upon, especially if it's unconvential.
