Planet13 - 4:03 pm on Jul 26, 2013 (gmt 0)
There are a couple of times where Matt Cutts has, citing wikipedia's nofollow link policy, lamented that it would be nice for them to change some of the links that they [wikipeida] trust to flow page rank.
However, I would not say the 1,500+ plus links are a COMPLETE missed opportunity for page rank. In theory, other people will discover your site through those nofollowed links and will link to your site - hopefully with do follow liks.
It would be interesting to see the rates at which nofollow and do follow links are generated as more and more people use soclia media in lieu of things like blogs or other types of sites.
If facebook were to launch a feature that allowed for longer blog pages, how much of a dent would that put a SERIOUS dent into the number of wordpress, blogspot, blogger, instagram users?
And what if all those outgoing links were nofollowed (if I remember correctly, aren't all facebook abound links nofollowed?)