Advertiser was a common name for newspapers at the time. It's an old publication (although I'm pretty sure it was called SomethingElse Advertiser). I'd guess it

Advertiser was a common name for newspapers at the time. It's an old publication (although I'm pretty sure it was called SomethingElse Advertiser). I'd guess it's using the older definition of advertiser "call attention to". The fact that the ads were well targeted was coincidence.