&gt; And, do remember, the people who made all the money in the gold rush weren&#x27;t the miners, it was the people who sold shovels and alcohol.<p>Ssssh, don&#x27;t give away the secret. ;)<p>Actually, startups designed to sell to other startups will fail too when the whole thing collapses like a stack of cards...<p>Enter Mandrill, which recently found its conversion funnel so ineffective that they suddenly shut the entire system down.