It seems that I ended up writing something bit lengthier than a tweet of facebook update about this.
Jenni Goodchild posted an analysis of gamers are death news articles by @firehawk32 at (http://pixietalksgamergate.wordpress.com/gamers-are-dead-article-analysis/). The most of these are posted at Aug 28, 2014.
Sargon of Akkad in his Youtube video claims that these articles can be tranced back to DiGRA and feministic conspiracy (https://www.youtube.com/watch?v=Rouq-VdgXdo).
Sargon of Akkad neglects a fact that Anita Sarkeesian tweeted about death threat toward herself at Aug 27, 2014 (https://twitter.com/femfreq/status/504718160902492160).
So the timeline can be written as follows:
- KD threats Anita Sarkeesian
- Sarkeesian shares this threat at Aug 27
- News articles about gamers are published at Aug 28
Which alternative is more plausible?
EDIT, Nov 2, 2014: Dan Golding in The End of Gamers to refer to Do you identify as a gamer? Gender, race, sexuality, and gamer identity by Adrienne Shaw http://nms.sagepub.com/content/14/1/28.abstract. With a quick look, it seems that claimed DiGRA connection is based associations. I appreciate if someone can point me direct link from those journalistic articles to DiGRA.
Petri Lankoski 
If you take away the conspiracy-rhetoric, probably both. Golding refers to Shaw, while the articles you mention refer to Golding. The writers of those articles probably haven’t read Shaw, but they echo the same sentiments studied academically by Shaw and recognized by Golding. There is some weak causality there, I think.
Golding is definitely aware Shaw’s article and feministic discourse. My intention is not to deny that, but point out that there is another more likely reason why those news articles surfaced the same time at Aug 28. Of course reality is always more complicated than one trigger or influence.