The overwhelming bulk of ARM processors are embedded processors--not even close to the complexity or cost of today's desktop CPUs. This article reminds me of McDonald's "1 billion served" ad campaigns... Some of these processors cost pennies in bulk, etc.
Sounds like standard marketing practices by both companies, then and now. I did notice that the title stated 842 chips per second were produced in the 4th quarter then, in the article it states as many as 842 were sold per second. While both totals could be the same those are 2 different things. I did not realize AMD, IBM, Intel and others don't share their unit shipments, according to the article.