Google search traffic

I think everybody likes graph like this ^) Not useful through shows are growing and click not %) And the question is why is it growing?

Latest activity suggestions that may cased it:

1. RebelMouse with custom url and lot's of tweets linked with rebelmouse.eplusgames.net
2. New mobile site's version m.eplusgames.net
3. A lot of recent activity on blog.eplusgames.net
4. Fast growing G+ accounts my personal +Semen Frish and +eplusgames 
5. Your explanation

 What do You think?

Thanks in advance and Happy Friday :)