Search is a hard problem, which increases the barriers to entry. But once a competitor has a method to crawl the Internet, that particular defensibility is gone

Search is a hard problem, which increases the barriers to entry. But once a competitor has a method to crawl the Internet, that particular defensibility is gone. I'd argue the data network effect is what gives them most of their defense. Now that they have a corner on what creates better search results, this is harder for others to defend against.