ARX are just a way to obfuscate what you are actually paying for something. It allows FDev to change the prices of items without most customers realizing what the change really amounts to. Some will calculate, but most will just purchase without question. It’s not real money, it’s “points”, so they have no mental value to a person.
I’m assuming that you won’t be able to purchase a precise number of ARX for your item, right? This is akin to the gift card system whereby you give frontier money upfront for a pool of points and they get to use the money as investment income until you redeem the point value through store purchases. Oh, and I’m sure it’s going to be financially incentivizing to purchase larger buckets of points over smaller ones. Another way for FDev to acquire piles of cash with no actual obligation to the customer at the time of purchase.
Edit: Just to be clear, I'm not advocating for Frontier to give everything away, and I am more than happy to support them financially if they continue to produce content I deem worthy of my money. I simply think this industry practice of obfuscation through meaningless virtual currency is a dirty practice that we should not embrace.