https://www.cnet.com/news/ftc-warns-companies-about-shady-warranty-terms/

The Federal Trade Commission sent warning letters to six companies who have used "questionable" statements about what you have to do to keep your product warranty intact, the agency announced Tuesday. The FTC did not name the companies it contacted, but said the companies market and sell "automobiles, cellular devices, and video gaming systems in the United States."

"Provisions that tie warranty coverage to the use of particular products or services harm both consumers who pay more for them as well as the small businesses who offer competing products and services," Thomas B. Pahl, acting director of the FTC's Bureau of Consumer Protection, said in a statement from the agency.