Since when is competition something a business should foster? They should, in fact, do everything within their power to make competition as hard as possible. This typically happens with things like patents, trademarks, copyrights, exclusive agreements, etc.

But it doesn't really matter because this blog post is a statement, not an argument. It is equally as persuasive as an entry which says the exacty opposite ("37 Signals loves competition") since the blogger gives no reason for his position.