Imagine this. I spread out my arms wide apart. My left palm represents reality. My right palm represents the dimension where the author of this article currently exists, but to get from left to right palm, you have to go one time around the globe.

This article is so far from reality, it's stupid. The data point is a single anectdotal one. There is no info on the data. There is no hint at all that twitter had anything to do with the decline - it could just as well have been birds pecking at the internet cables to all the subscribers houses and disrupting exactly those packets.

Totally biased in-the-bubble speculation, this blog post is not even wrong, it's just silly.