>>542293226
Long story short: Roblox but Genshin
Short story long: A UGC gamemode that's completely separate from Genshin, but is built in Genshin itself, uses the Genshin engine and Genshin assets.
Being an UGC (user generated content), users are able to create their own games or play games made by other players.
The gamemode has its own monetization system, explained very roughly by this absolute dumbfuck here
>>542292970
>I don't care about any of this
It won't affect Genshin in the slightest, and vice-versa. You can ignore it and pretend it doesn't exist
>I'm interested on playing it, but don't really want to spend money
The ONLY monetization is tied to cosmetics. There's no other money based limiter
>Does this have gems tied to it?
No. The only benefit you get is that you're able to use your Miliastra PC in the overworld as a teammate, whose level is based on your Miliastra level (also the 3 ascension wishes tied to character ascension).
The playable Miliastra PC sucks ass. Legit Aloy-tier. They're mostly built for aesthetic purposes and not combat.