The following commentary comes from an independent investor or market observer as part of TheStreet's guest contributor program, which is separate from the company's news coverage.NEW YORK ( Trefis ) -- LinkedIn ( LNKD) has seen rapid growth in its monthly unique visitors, from 4.5 million in 2007 to around 50.5 million in 2010. We expect growth to continue, although at a slower pace, due to the larger base effect. New features like LinkedIn Today, LinkedIn Swarm and LinkedIn Skill have beefed up the number of visitors to LinkedIn. However, competition from other online recruitment services and social media platforms is always increasing. LinkedIn's newest competition is from professional networking apps like BranchOut and Monster Worldwide's ( MWW) BeKnown, which are leveraging Facebook's wide user base to expand business. Although we expect an increase in LinkedIn's average monthly unique visitors from 81 million in 2011 to around 215 million by the end of the Trefis forecast, Trefis members predict the unique visitor count will rise from 108 million to 300 million during the same period. The member estimates imply an upside of 11% to the Trefis price estimate for LinkedIn's stock. We currently have a Trefis price estimate of $30 for LinkedIn's stock, about 70% below the current market price of $101. We have explained in the past why we remain fundamentally bearish on LinkedIn.