Its addictive gameplay mechanics are not isolated from the addictive gameplay mechanics. Instead, they are tied directly into combat and loot drops that are part of the game. Diablo IV Gold is uniquely well-positioned do this; as my colleague Maddy Myers pointed out, the games that are heavily focused on loot have always had a slot-machine feel, which Diablo Immortal's business model takes literal.
Blizzard has taken pains to emphasize that the monetization of Immortal can be ignored until the game's end and it's true and claims that the majority of players are enjoying the game without having to spend an ounce, which seems reasonable. But it's disingenuous to suggest that the real pleasure of Diablo games lies in playing through the story, instead of trying to max out your character. It's equally absurd to claim the fact that these games have been designed to stimulate desire to reach the power cap for the players. For those who have a tendency toward addiction to gambling or towards the addictive nature of Diablo's game itemand, perhaps either of them -- the crest system, as it is known, can be highly exploitative and may be damaging.
To everyone else it makes Diablo less fun.
We have been here before, or somewhere like it. When Diablo 3 was released in 2012 it came with an auction house using real money, where players could purchase and sell their items. In theory, it was there in order to stop fraud and cheating that plagued item trading with Diablo 2. But in order to steer players towards an auction house Blizzard reduced the drop rate of loot in the game to such an extent that equipping your characters with loot became a monotonous chore and the game as overall was not enjoyable to play. After the auction house, which was not well-liked, was taken down and drop rates were increased in 2014, Diablo 3 instantly became more fun, even before the innovations of the Reaper of Souls expansion lifted the game to legendary status.
This is the point: it may seem sensible to try to monetize Diablo's loot. However as soon as you do you're taking enjoyment out of the game. This is the same for Diablo Immortal, and it is noticeable before you reach the final game due to the fact that it is a fundamental part of the game's design. Drops of loot aren't as effective as character development is artificially controlled and spread over too many systemsthat are grindy and buy Diablo 4 Gold too granular. It has been more artfully hidden than it was at the beginning in Diablo 3, but it's a similarly unrewarding slog. The purchase of a battle pass or investing big bucks in legendary crests doesn't help much since paying for a great item drop will never be as thrilling like just getting one.