It is nice to see how LinkedIn has managed to maintain their professional status amongst the social networks. Other networks such as Plaxo and user customized Ning communities have a tendency to turn into friend quarters. Being a friend quarter you have to compete against Facebook, Orkut, vKontakte or wer-kennt-wen which means you are probably dead.
But what is to earn from engaging in or letting your employees engage in LinkedIn. Personally I use LinkedIn when I want to find companies and people who can deliver online services to me when I have too much to do myself. If you have a business and work with YouTube, Social bookmarking promotion (quality, no quantity submission) or social platform development, then please connect to me here: Jesper Åström on LinkedIn