Personally, years ago when I was coding I would get neck strain from having the monitor below my eye level because I found my head movement always followed my eyes. So when my eyes were always looking slightly down, I would always start to tilt my head down to compensate. It wasn’t until I raised my monitor much higher that my headaches went away. Even now when I hold my phone, I naturally hold it to the middle of my eye level, not below.
In a way this is the same as money to them, just a new generation concept of money. Where older generations use money to buy physical items, they use simulated ingame currency to buy digital items.