They might have burnt the reputation built for this particular pseudonym but what is stopping them from doing it again? They were clearly in it for the long run.
I literally said "they", I know, I know, in English that can also be interpreted as a gender unspecific singular.
Anyways, yes it is an interesting question whether he/she is alone or they are a group. Conway's law probably applies here as well. And my hunch in general is that these criminal mad minds operate individually / alone. Maybe they are hired by an agency but I don't count that as a group effort.
