Ever since I learned about Scoop.it, thanks to our fabulous PJ back in January, I've been submitting every post to Scoop.it.
One of my pages that was struggling in Google ranking, I noticed I'd forgotten to post it to Scoop.it. But as soon as I posted it, it started to climb up. So I think it works and recommend you to try too if you haven't.
Big THANKS again to PJ!