What a freaking confusing diagram. Seriously, wtf?

Also, is it me or do Path and Pinterest have the same freaking logo?

"Looked at in this light, it makes perfect sense that Tumblr went to Yahoo for $1.1 billion. Thanks to years of neglect of properties like Flickr, Yahoo was a social backwater. Without a pool of social updates to call its own, Yahoo would always be subject to the whims of Twitter, Facebook, and the rest. Now it is part of the flow."

Kind of, but the quality of social updates on Tumblr is kind of low.

"LinkedIn, lacking the leverage over Twitter that Facebook holds, went from being what Twitter called "the perfect combination" in 2009 to something incompatible with "delivering a consistent Twitter experience." After some worries that LinkedIn would feel less lively without tweets, the rift actually worked out for its media ambitions. It turns out that many tweets weren't that professional in nature, and LinkedIn has moved from being a sink for tweets to a purer source of work-related information. Which, of course, it is now trying to have flow to more sinks."

It actually worked out well for LinkedIn to sever ties with Twitter.

"Did you know, for example, that you can't pin updates from Facebook to Pinterest—even if they're posted publicly on a brand's Facebook Page? Or that Google+ is a virtual island, rejecting crossposted material as "social spam"?"

I did know both of these, and I'm annoyed by both of them, too.

Note how few out-arrows there are from Facebook and Twitter.

That's not just annoying; it's disrespectful to consumers that they demand to be sinks.

The consumer does not benefit!  Not good long-term strategies.