It has something to do with the site being sponsored by google or google ads. That's how it pays for itself I believe. We add those ads to a ban list every week. It takes some days before the ban takes effect. But there's so many & as I said, they use different addresses so some keep coming back. It's as annoying as hell. I'm not directly in the line for doing that. It's up to the site admins. I just contact them with the new addresses & sites. Pity a more comprehensive filter couldn't be used.