Why are scam site ads appearing on my front page.

This is the second time there has been an ad for "forever stamp sale up to 55% off" on the front page when i load up my browser.

These are fraudulent scam websites.

I run an online business and use something like 400 stamps a month. I almost ordered a 1000 dollars worth of stamps from these sites.

They need to do a better job curating and protecting the user base before running SCAM adds on the front page!