I can vouch for this from experience -- a company I worked for many moons ago had Allstate (the insurance company) as a client, which accounted for about 90% of

I can vouch for this from experience -- a company I worked for many moons ago had Allstate (the insurance company) as a client, which accounted for about 90% of revenue. So every time Allstate wanted something, the company had to bend over backwards to keep them happy. This massively sandbagged product development, and the company never grew to its full potential, in spite of having some genuinely solid talent working there.