I've seen this more and more on sites. I have adblock plus enabled, but lots of sites are still able to display ads. Here's one, you'll see the ads under the post: http://www.viralnova.com/animal-memes/ Mousing over an ad shows it's being hosted on http://contentr.net/ but if you go there, it just shows this message: Hi, I am your new HeroFW app! Each site that is able to do this, the ads are being hosted with different domains, but the ads are the same. It somehow looks like it's content the site is hosting themselves, but the domain the ads point to are different. I've used tools to inspect the code, but I don't see how they are doing this. Does anyone know?