It's not just evident in the use of paid currency

Real-time money transactions aren't a novelty by any stretch of imagination. Diablo Immortal didn't pioneer them however it would be untrue to buy Diablo IV Gold claim that they are a actual fact. The action-RPG from Blizzard isn't the primary reason, but rather the worst amalgamation of hundreds of free to play mobile and PC games. There are two Battle Passes, both with their own rewards that remain exclusive to your character (and not included in your general roster), and too many various currencies for the average player to keep track of, Diablo Immortal's economy reads like a huge mobile marketplace.

The practices, even if they're faced with opposition however, have become commonplace within the game industry as a whole. One could argue that prevalence of loot boxes or other real-money transactions in AAA games has been a factor in this unregulated economy, but the more that AAA gaming shifts towards a model of games-as-a-service, the more it has similarities to game-based mobile apps that've been within this very popular sector for over a decade.

It's not just evident in the use of paid currency to obtain items and gacha mechanics and information about drop rates in more difficult items. Gacha is the practice of playing with in-game currency, no matter if it's free or purchased via an in-game store, to purchase something randomly objects, in the case cheap Diablo 4 Gold Final Fantasy Opera Omnia, or characters in the ever-popular (and constant) Fate/Grand Order or Genshin Impact.

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