Plus: Amazon announced last week that two fake review brokers were arrested.

Yelp has started publicly naming and shaming businesses that pay for reviews. The review site’s new index documents businesses offering everything from a crisp $100 bill for leaving the best review to a $400 Home Depot gift card for a five-star review. It also lists every business whose reviews have ever been suspected of suspicious activity, like spamming the site with multiple reviews from a single IP address.