Asheras wrote on Feb 20
th, 2019 at 11:56am:
As far as I can tell most all of the monteziation is on cosmetics and QoL stuff.
Cosmetics, bank space, special bank tabs, and character slots.
Whole game is free, but you "need" bank tabs, especially the currency and map tabs, to play effectively, and you need premium bank tabs to get involved in trading. A quick look around in the public areas and you'll see just how well the cosmetic stuff sells, though.
All the content updates overlap the core game during the "league" in which they are introduced, and most (but not all) get added to the core game in some form at the next update.
The sheer amount of this content can be overwhelming, but they're taking steps to streamline it into the main game so new players aren't hit with a dozen unfamiliar mechanics as soon as they step into endgame.
It is a great game. So great that I tend to burn myself out on it. Am currently taking a break.