Quoting an employee of Acti-Blizz on this topic is, in the least, questionable. Rule number one of looking at statements or statistics produced by those who have the highest stake in potential positive interpretation of said data is not to trust them.... insert reference to stats on addiction, cancer, and heart disease produced by the tobacco industry up to the 2000s.

And I endorse Mr Angry's second response to this article.

Still, I want to know how much massively is getting paid to publish this stuff.