In early June, Kaphan added a reviews feature that he’d coded over a single weekend. Bezos believed that if Amazon.com had more user-generated book reviews than any other site, it would give the company a huge advantage; customers would be less inclined to go to other online bookstores. They had discussed whether such unfiltered user-generated content could get the company in trouble. Bezos decided to watch reviews closely for offensive material rather than read everything before it was published.