In the past couple of years, Casper Sleep Inc. signed up for affiliate marketing through sites like Mattress Nerd, Sleepopolis and Sleep Sherpa, but it soon decided the companies did not fairly disclose to customers that its mattress reviews weren’t completely unbiased. Casper dropped the services, and its high ratings across the websites allegedly went downhill.

Now the company is suing the three website owners for deceptive marketing practices.