While this came as somewhat of a shock, it was not due to any sort of issue with Hearthstone itself. Indeed, as Wilhelm points out, Hearthstone is the only Blizzard game still on the Top 10 PC revenue list (per SuperData). The issue appears to be a “strategic” change by the owners, e.g Curse / Fandom:
Fandom/Curse employee throwaway account here.
It’s a decision from higher ups/Perkins Miller (new CEO from Stubhub) to focus the company on the Wikis and D&D Beyond because money. They want the community to move to the gamepedia wiki, they’re the same sites in their head (source)
The spiritual successor site is… OutOf.Cards. As in, Out of dot Cards. Not wanting to be pigeonholed into just Hearthstone is fine, but… “dot Cards?” I guess…
There are probably much better Hearthstone content sites out in the world even before HearthPwn’s closure, but this sort of thing still brings me pause. We are constantly told that “the internet is forever,” but that’s not quite as true as it seems. Sites close all the time, for sometimes entirely random reasons, and while they might still technically exist like my first-ever Angelfire website created over 15 years ago, information often has an expiration date.
Watching it expire right in front of you though, is… uncomfortable.