Open Source and freeware because it is protected?

I just again was curious so I checked out a link called CiteULike. I found it still at the touchscreen section of my reading tour. “Accidentally” I hovered over the share button and then I was keen on checking what’s there – somehow I’m really doing this collecting as many social sharing sites in order to boost my traffic, though I did not have yet much boost. Anyway, I checked CiteULike what I met already once and at that time I decided to leave out from my social networking bookmarking or how to say, sites. It’s an awful design and – I design websites – as you may know it for now… So as I gave it another chance I clicked on the browse button to see what’s in and I found this: FULL ARTICLE +