As pointed out by others, your tone suggests dismissal of the article. The article is interesting and informative and as an old network admin I took little issue with them using the term man-in-the-middle. Further, Wikipedia's definition seems to support using the term the way the author does:
> a form of active eavesdropping in which the attacker makes independent connections with the victims and relays messages between them, making them believe that they are talking directly to each other over a private connection, when in fact the entire conversation is controlled by the attacker.
In the article, the connection is being controlled by the attacker after breaking into and controlling an innocent ISP's BGP advertisements. The attacker also provide a means to route the data back out another connection as well, which implies something was sitting in the middle of the connection grabbing and redirecting data to another connection that hadn't had it's BGP tables altered. (If it hadn't, the data would have just gone in a loop at the ISP.)
In the other cases of BGP 'hijacking', the data simply disappeared because it wasn't routed back out to the Internets. If someone null routed Gmail, well, it won't work because I wouldn't get any data back to run the browser view. In this case, the data made it back to where it was going, which implies the conversation is being controlled by the attacker.
I'm ignoring your last point as it seems a bit off topic. Censorship and subversive BGP activities have little to do with each other.