However, is it any good? I'm not sure it's worth creating content for 150,000 fans, but the linkage is good, using Facebook as a portal to some rich online content on ASOS.com. Facebook's high frequency of traffic has been manipulated, with the app cleverly acting as a filter to hive it off on to ASOS.com. It's a nice use of the channel. And where there is existing content, you should certainly promote it.
Ultimately, as a fan page, this works because it is in tune with Facebook and the way people use it. The messaging isn't overly commercial, and it engages fans ('Glad you're happy about the sale! We want to know your top sale picks... what have you bought?'). It is this dialogue that is fed through to the fans pages for them to like, dislike or comment on. It keeps ASOS front of mind and front of feed, and fans are happy with it. Job done.
Agency: Syzygy.