Usually through Google Seo/ads.

Google isn't that too strict with those advertisers that are using google to be on the top results. It's been an issue even before when there were doublers that have passed and able to show to the ad results whenever you type the keyword that has been set for those scams.

Even in YouTube which is also owned by Google, there are ads popping on a video format and as well as on their google playstore. They're not strict and we don't know if they look at this issue very seriously.