Doesn't this data already exist in the form of ISP data brokers? I'm thinking of data that makes its way to into the hands of some marketing companies that show

Doesn't this data already exist in the form of ISP data brokers? I'm thinking of data that makes its way to into the hands of some marketing companies that show anonomized URL level traffic for a given website. Essentially giving you ability to see analytics on a website you don't own. Anybody know who the big players/ISP data brokers are?