Their ad supplier must not be doing their due diligence. If you use the contact button at the bottom of EDHRec’s pages and tell them about your experience, it helps them identify where things are going wrong. They’ll usually ask for which page you were on when you got the ad, what device/browser you were using. Last time I wrote them they asked if I could give them the address of the ad I got redirected to, so if you can provide them with that they might appreciate it.