Gacha games are video games that implement the gacha (capsule-toy vending machine) mechanic. This is somewhat similar to loot boxes, inducing players to spend in-game currency to receive a random virtual item. Most of these games are free-to-play mobile games, where the gacha serves as an incentive to spend real-world money.
I'll admit I didn't do much (anything) with this activity. As Wikipedia tells us, it seemed to be encouraging me to spend real-world money with not much reward.
The 2021 New Year's Lucky Gacha event lasted for the first 3 days of 2021. Players were able to spend AMS Points to open Gacha spheres which contained various rewards.
The rewards for Gacha weren't bad, but not great either:
The event was over so quickly I didn't get a chance to investigate the rewards from the AMS Copter and AMS Bomb items. If the event comes around again I'll capture that information.