Tim is, as usual, right. Scaling should be a conscious choice, and headlong rush to corner the market might be good for VCs and early investors, but for most companies, is a rush to suicide.
Also worth watching in this space is the team behind Basecamp, who have a very healthy and sane outlook on work, company building and doing business. They have a couple of books spelling it all out, in detail. Well worth your time if you're a founder or entrepreneur.