Lots of business owners spend their lives trying to land the whale - the single, massive, brand-name account that will fatten the top line and bestow instant credibility. But big customers make me nervous.

The risk of relying on a handful of customers is not just financial. Your product also is at risk when you're at the mercy of a few big spenders. When any one customer pays you significantly more than the others, your product inevitably ends up catering mostly to that customer's specific needs.

A large user base helps shield us from things we can't control. You can spend years catering to a major corporation, for example, only to see your contact there move on.

Jason Fried Quotes