So why was this NYT article pulled?

This NYT article was pulled and some are wondering why.
http://www.nytimes.com/2015/11/16/world/europe/paris-attackers-communicated-with-isis-officials-say.html

A brief clip of how the article started.

I would say the article was pulled or asked to be pulled because the possible briefing in question is a NATSEC issue. 

Some say ISIS terrorists are communicating over PlayStation 4 networks:

http://www.politico.eu/article/why-terrorists-love-playstation-4/

I am still convinced that some are passing messages on pastebin such as this screenshot below:

However they are communicating. People tend to get caught.

I am still praying for Paris. I hope everyone responsible for this stupid senseless act is caught.

Update1:
As @krypt3ia pointed out and I can't emphasize this enough. The PS4 article and any other encryption methods are unsubstantiated claims. The public will more than likely not find out the true methods that were used because of surveillance reasons. 

@krypt3ia has an great post on some Daesh Darknet boards that were put up recently. It's worth the read as well as any updates. 

Update 2:
A reporting error linked the Playstation 4 to Paris attacks
http://www.theverge.com/2015/11/16/9745216/playstation-4-paris-attacks-reporting-error