Why is there a dearth of articles in 2014 and 2015 about webcam exploits?

I searched for articles and I could find a large number of articles from December 2013, and even a research paper from then.

The next major event seems to have happened in April 2016-July 2016 when Comey said that he tapes his camera, Zuckerberg's photo with the taped camera and mic was posted on his Facebook account, and there was an all-time high of privacy and security related discussion.

What happened in the intervening 2 years?