From Brand Perspective: The brand Microsoft always gets associated with Prosumers. The name LinkedIn also attracts Prosumers. It is a great match. However, LinkedIn had a goal of connecting all the working professional under one roof. LinkedIn Brand was only going to add value to Microsoft and not the other way around.
LinkedIN a league of its own: Facebook connects people in big time (1BN DAU & 60BN messages per day), the distant second in a different league(professionals) is LinkedIn. Facebook for business is supposed to come out soon. Until then there is no competition to LinkedIn.
LinkedIn Stocks Fell: Back in 2016 LinkedIn stock fell. Google and Facebook have 75% of Ad Spend as per 2016 Trend Report, which leaves 25% of the Ad spend to the rest of these big companies. Also, LinkedIn relies more on subscription based model which is a very tricky business as the people cancel their subscription if they do not see value in it. Even though it is a great place to network which is provided for free, their incremental value that they provide through subscription is not a must have for all professionals.
LinkedIn Buyout for Start Up Companies: