You will find all threw supermechs you can never ever buy a specific item you have to get items threw opening “item chests” which really really pushes you to do one of two things grind very very slowly to the top or spend money to buy tokens to get these " premium chests" which is pretty common in most free2play games but this… is not done right or ethical at all it finds every nook and cranny to shove this crap down are throats like the constant sales and things like that. They actively try to exploit peoples emotions and weaknesses. for example the ranked system is i have to say very unbalanced on purpose to make people think hmm i see this is on sale i might as well buy it , it starts a five dollars here and there but what they are really aim for is the people they call “Whales” basically people who will pay ridiculous amounts of money for a game that ain’t even worth 8 bucks. they use slot machine tactics all over the place like exclusive offers , the buy now to get something very powerful but at the end of the day it is a 1 in a 100 chance but the people don’t know that they spend little to a 100 bucks but there are some tragic stories out there of people who have had there lives ruined by these “loot-boxes” and “card packs” literally bankrupting them self’s or putting them selves in crippling debt like fifa is an great example of this just read into the stories about the addiction these things cause , and they get away with it because the law has not caught up with technology yet. and just a word to the wise don’t fall into the pit whole of these loot boxes.
( https://www.youtube.com/watch?v=NLDid1UNyg8 ) This will explain this better than i could ever explain it btw.