Feels weird they make such a big deal with maru being the currency here when u could just always exchange it with yen. Why not just accept yen then?
What's the point of introducing premium currencies in games?
First of all, the legal matter: none of the "stores" are licensed, so they can't legally sell stuff. Maru, however, isn't a legal tender, since you can't exchange it back into yen; it's just stuff you bought, and you can barther them with other stuff, a bit like balls in Pachinko parleurs.
Second, it is to introduce as many degrees of separation as possible between what you are buying, and how much does it actually cost; since there are at least two different currencies (physical and digital maru) and at least one of them has multiple different exchange rates ("discounts" if you buy in bulk) you will never know exactly how much you are paying.
Third is the economy angle: the one handing out maru can just create more (like countries do when they want to buy more things than they can actually afford). This is particularly easy with the digital maru, and probably one of the reasons why they are pushing for the transition (again, compare to real world monetary policies). In addition, if that guy also controls a sizeable part of the available space (which I honestly take for granted: even if they didn't at the beginning, they definitely do by now) the have the way to control how much currency enter and how much leaves the system. This will give them complete control over the economy of the place.
Fourth, there's the population control aspect. The exchange boot is "rumored to exist" and is hidden in the deepest part of the place: only people deeply rooted in the system would know about it. Newcomers will have to be sponsored by someone already there in order to gain liquidity, and by the time they will discover the boot (if ever) they will already owe a great deal of money and/or favors.
In addition, since only a small "elite" knows about the boot, and the boot is the only place (besides the king's personal expenses) from which the maru enter the economy, while they are constantly siphoned out through the rents, this gives them a very strong control on people there, since you need to work for them to have money.
Moreover, since you can't exchange maru back into yen, people are shackled to the place by their own investment; ironically, the "elite" would be the ones more ensnared by the system, since they are the ones putting down real money in exchange for power.
Finally, there's the surveillance aspect, pushed through the digital maru. One could say that digital currencies are easier to track, but that pales compared to the OTHER issue: you MUST use an always connected I/O device with a "government"-issued app. Orwellian distopia, here I come!
In that place there's no freedom, only the illusion of it.
Long story short, the Den of Evil is a huge fucking scam. Big surprise there...
Thank you for attending my TED talk on dystopian societies.