The old adage is you can't copyright facts and there was certainly no requirement for TNW to do any "original research" to share these findings. However, when you copy/use facts, you wade into hot water if you also copy the structure and the way those facts were originally expressed. The original TNW article shown here seems to step over that line with a barely masked copy of the original paragraphs. What bothers me…
The legal precedence is in the Feist Publications vs. Rural Telephone Service supreme court case http://en.wikipedia.org/wiki/Feist_v._Rural
You would still have to cite your sources, even if you copy the data. And any annotations are not part of the dataset. These annotations would ble equivalent to the article text, which was copied pretty much word for word.
Here in Norway they would expel you from all higher education for a minimum of 12 months for such plagiarism.