Didn't Facebook for a while have the ability to target a single individual for ads? I seem to remember seeing some things on HN about people doing this a while back. Makes sense that someone would turn it into a service.
Yes, and I think they still technically do. At some point they changed it from a single target email to requiring 20, but you could get around this by uploading 19 others of a different gender, then use gender as a filter later on when creating the target list.
