Even though they're sometimes encountered with resistance, have become normalized within the gaming industry in general. One could argue that the widespread use of loot containers or other real-money transactions within AAA games have been a factor in this D2R Items unregulated economy, but the more that AAA gaming shifts towards a model of games-as-a-service and the more it shares similarities to the mobile gaming that has been in this highly popular area for over a decade.
And this doesn't just show in the use of paid currency to obtain items such as gacha, but also in gacha mechanics, and the public disclosure of drop rates for the more scarce items. Gacha is making use of in-game currency, regardless of whether it's free or acquired by a shop in the game, to acquire something random objects, for instance, in the case of Dissidia Final Fantasy Opera Omnia, or characters in the ever-popular (and persistent) Fate/Grand Order or Genshin Impact.
In Diablo 2 Resurrected's case, there's the usage of legendary crests (which can be bought or earned) to increase the chance of a five-star gem appearing in endgame dungeons. While it's not completely traditional in its way of presenting (most gacha are performed through "rolling" on a time-limited banner) it is still playing randomness in a similar manner. In many ways it is the case that gamers are using the Diablo franchise was building towards these kinds of mechanics since its beginning as Maddy Myers wrote a few weeks in the past.
Diablo 2 Resurrected also, in clear terms, draws direct inspiration from a "feeding" method that Japanese, Korean, and Chinese mobile games have normalized for over a decade. "Feeding" is the process of increasing the stats, attributes, or rarity of an item , by receiving a duplicate drop. The duplicates are fed to an item of similar rarity, which increases the overall stats for the item. In general, five copies are required as a standard for maxing the character or item.
My first introduction to "feeding" was through Fate/Grand Order, which was first made available from Japan in July 2015 and grossed a total of $4 billion dollars around the world in 2019. To create a character that was the best it can possibly be I needed copies of each. And when a particular advertisement came along I spent upward of 300 euros to purchase the 5-star character that I had been looking for for years. But I didn't get the identical copies I needed for this character's full potential. The rates for the highest-rated 5-star characters in the range of one percent, it's not a surprise that I failed to get a copy of the character when I was in the game (which I have since uninstalled). In July 2021, Fate/Grand Order was the seventh highest-grossing mobile game of all time, and was ranked after Konami's Puzzle & Dragons, which may be of interest, since D2R Ladder Items buy is also a gacha-based game.