Where to share?

A brief and unscientific survey of social bookmarking buttons provided by journal websites. Take with pinch of salt and/or tongue in cheek.

PLoS get it. As you'd expect.	BMC get it too.	Even ACS kind of get it.
OUP get it to a degree.	Someone doesn't get it.

I know, all bookmarking services provide their own tools, such as bookmarklets. However, I suspect that a button is more convenient for many people: it’s a courtesy and an advertisement for social bookmarking and online reference management tools.

So NPG: is it “we promote sharing” or “we promote sharing so long as you use our service?”