Hello there! I've been puzzled by that Strange story by Andrew Marshall too. The explanation you linked to didn't work for me. Would you mind explaining, please? (And when is he going to write a Doctor Who, eh?)
Just to clarify, what I linked to here is (what I think is) the story itself, not an explanation.  I still have no confirmation that this Ramset is the real one.  But if it is, the story works in a weird zone that straddles the line between in-universe and meta crossover in-joke. So the facts are these:
Canon Black tells John to figure out an anagram.  The demon name is Ramset. (One of the few pronounceable arrangements of those letters that hasn’t been used before, e.g. Tremas, Mr. Seta, &c.)
Canon Black tells John he is after a new lease on life. To… regenerate one might say.
The black filing cabinet disappears before John’s eyes after Canon Black has opened its doors. He seems to have entered an upright cabinet that should be too small for a person to do much inside it, and sort of … dematerialized.
Tom Baker, former Doctor, guest starred as a blind priest. Â Canon Black tells John he destroyed the sight of the person who could have recognized him.
John has entered a large building in London which he eventually realizes is round, and later he sees NW1.  This is the clue that stumped me for ages, because I’d never seen a picture of BBC Television Centre.
Canon Black tells him that he arranged for the woman who worked in the office to transfer funds from one project in that organization to another.  As a result of which, everything that makes up Strange’s world is disappearing  to the “plague.”
This all happened in the early 2000s, at the time an organization housed in a large round building in London stopped funding a show about demons and was investing resources in a project that would involve a character formerly played by Tom Baker, a small upright cabinet that could disappear with people inside it, and a character whose name is an anagram of Ramset.
So my interpretation: Canon Black is the Master, and he arranged for the BBC to defund Strange in order to bring Doctor Who back so that he could live again.
