Wired: Some of the Most Popular Websites Share Your Data With Over 1,500 Companies.

“A WIRED analysis of the top 10,000 most popular websites shows that dozens of sites say they are sharing data with more than 1,000 companies, while thousands of other websites are sharing data with hundreds of firms. Quiz and puzzle website JetPunk tops the pile, listing 1,809 ‘partners’ that may collect personal information, including ‘browsing behavior or unique IDs.’”