The relevant metrics would be daily/monthly active useres (DAU/MAU) and churn rate. But Blizzard doesn't report those number's unless they're good (e.g. Hearhstone/Overwatch hitting new record MAU last year), and hasn't ever released any such numbers for Diablo 3.
This article[0] claims Blizzards overall MAU was close to flat YoY-Q4 2016-2017, knowing that Overwatch and Hearthstone are hitting records high MAU, while overall MAU is flat means that the other games (D3, SC2, HotS) are losing players.
It's a success in the way Matrix Revolutions was a success, massively profitable[1] yet a disappointment to fans (see diablo 3 fan ratings[2]).
That's an arbitrary statement. The only relevant metric is revenue outside of whatever bars you would like to matter. Over time, units sold is a poor return and D3 was disappointing against every prediction beyond units sold. It was a disaster, in comparison to the recurring success of PoE.
> The relevant metrics would be daily/monthly active useres (DAU/MAU) and churn rate.
This metric doesn't really make sense for a (mostly) single player game like Diablo. Once the player has finished the game they're unlikely to return. For a game released six years ago of course we would expect the current active player base to be very small - most of them have since moved on to other games.
This article[0] claims Blizzards overall MAU was close to flat YoY-Q4 2016-2017, knowing that Overwatch and Hearthstone are hitting records high MAU, while overall MAU is flat means that the other games (D3, SC2, HotS) are losing players.
It's a success in the way Matrix Revolutions was a success, massively profitable[1] yet a disappointment to fans (see diablo 3 fan ratings[2]).
[0] https://venturebeat.com/2018/02/08/blizzards-monthly-active-...
[1] https://www.the-numbers.com/movie/Matrix-Revolutions-The#tab...
[2] http://www.metacritic.com/game/pc/diablo-iii