I think the tvtropes forum used AdWords (? Not sure) and I certainly saw ads there which redirected to open the app store (on android).
I'm not certain, but I believe the ad network being used was associated with Google.
(Not that the ads were officially allowed, I think I read things on a Google support forum which indicated that they hadn't finished blocking those ads yet, or blocking them again when they were created again. Still, I think an ad agency has a responsibility to proactively(?) ensure that they do not serve any malicious (in the security sense) ads.)
I'm not certain, but I believe the ad network being used was associated with Google.
(Not that the ads were officially allowed, I think I read things on a Google support forum which indicated that they hadn't finished blocking those ads yet, or blocking them again when they were created again. Still, I think an ad agency has a responsibility to proactively(?) ensure that they do not serve any malicious (in the security sense) ads.)