I think in many business’ cases stuff like this is simply to not give everything to competition.
In Blizzard’s case, I don’t think it’s that (sort of) but more that given their aggressive statementing over subs since WOTLK, continuation to do so now will be taken as an objective indication that the game is falling in popularity (even if it’s not dead or unplayable) and that’s something they probably don’t want to admit.
I mean i’m not in the “WoW is dead/dying” camp, because WoW is playable, there are easily enough players to make what I want to do (and most of everyone else) possible, where it requires players. However only a fool would claim WoW is as popular as it once was, of course it isn’t.
World of Warcraft was once the name of game even non-gamers probably knew about, now it’s probably recognised but in a much lesser sense and less often.
Perhaps blizzard don’t want to acknowledge that? Who knows. In my eyes it’s natural, for an MMO to have 16 years or more before it goes into “maintenance” is a bloody good run imo, even if it’s vastly less popular than it was.
I myself don’t need to know the metrics to discern whether the game is playable enough, I can kinda work that out through play. Having access to a figure won’t change that honestly, because the figure won’t tell me (of those players) which ones are active, into X content, into Y content or even logging in regular, so it’s not necessarily a failsafe way to determine whether the game is “playable” or not.
I mean sure if the game has 1000 subs then obviously issues. But what I mean is say a game has 300,000 subs. Of those, 100,000 could easily be “i won’t touch M+ type content” players, and another 100,000 could easily be “i log only on weekends” or whatever. So if i’m a player into M+ stuff and want to know whether this game will do it for me, these figures alone won’t necessarily tell me that without them being analysed in detail.
And honestly, i think it’d be apparent if a game had sub 10,000 subs, because for a start you wouldn’t have multiple servers. There’d be no reason to pay for it when you don’t even need them to manage the players, and even a company as secretive as blizzard, I do not think, are prepared to maintain a lot of servers to try and create an illusion of busyness because it hurts their bottom line too much in doing so (and the spread of players will be obvious to the playerbase and make them moan → see TBCC and Classic WoW)