I always found those games extremely depressing, and... Widely known to be botted to hell and back. Ever since the Hearthstone cheating software became capable of "emulating" human behavior, it became clear that 90% of the userbase was non-human. Why play then? An unbalanced game, by virtue of their grind/paid advantage, and you're not even outsmarting anyone. Single player deckbuilders like Slay the Spire and its spawn are objectively better at that point.