When Ryan Abood looked at the books for his parents' New Hampshire flower shop, one number popped out. Without a bit of advertising, sales of gift baskets had grown 400 percent. For a year and a half, he worked a hundred hours a week to make his spinoff, GourmetGiftBaskets.com, into the third-largest player in his niche. Then, one day, he woke up to find that Google, the source of 80 percent of the company's revenue, had banished his site from its search results. His company ended up the better for it.

On November 11, 2008, I woke up at 6 o'clock and did a Google search on my phone, like I do every morning. We're usually one or two for just about every industry keyword. But we were nowhere to be found. I opened up my laptop. We weren't in the first thousand results. This was right before the holiday season, when we typically make 40 to 60 percent of our annual revenue. It was really, really devastating.

We weren't sure what had happened. Occasionally, Google will drop a site from the index -- just algorithmically forget about you for a few days. People said, "You either have some type of temporary exclusion, or you have a penalty."