If you choose to tell your friends about the Seinfeld DVD box set you just bought from Amazon, for example, your friends will also get a small AD right beneath that update.

比如说，如果你选择告诉你的朋友你刚在亚马逊买了一套Seinfeld(某喜剧演员)的DVD，你的朋友还会在你的更新信息后面收到一条相关广告。

youdao

Perhaps the cleverest and dirtiest ad of the campaign so far, hiding beneath the obvious message about the spending plans a reminder of Mr Hague's speech to the Conservative conference, a reminder of his relative youth and inexperience.

BBC: Tattooists and tax