Update :
Here's a clue of what kind of scam those "auto warranty" companies are & why you should stay away from them at all cost.
www.BBB.com
There's a lot of info regarding this issue across the US & canada.
It's important to highlight the fact that many auto warranty companies holds a called RRG (risk retention group) rate which means that the auto warranty company also insure its self which is according to many state general attorney a bad choice because many of those companies aren't financially solvent to cover all claims at once as such as auto insurance companies
If you shopping for auto warranty focus on those whom are insured by big leading insurance companies in the US that provides insurance coverage to these auto warranty companies.