There's a lot of enterprise focused startups that deal almost exclusively through their API. Gnip, among others, comes to mind. As for your second point, hiring

There's a lot of enterprise focused startups that deal almost exclusively through their API. Gnip, among others, comes to mind. As for your second point, hiring and managing an integration team for the early revenue is nice, but the point is scalability. To be clear, I"m not saying never do integration in my post. I'm saying there's many companies that shouldn't but do.