I do not agree, it would surely be possible for everyone to perhaps own anything that is locked even if it rather was a needless kit you already have in dozens if the price of the let's assume normal item box (because you haven't mentioned what kind of item box) is reduced to 200 credit meaning that if you win or lose a battle I bet you will surely make your hang to the "Shop Section" and your try your luck until you get to stumble upon something rare. Despite that Legendary Items if you check the first normal item box have a 3% to be earned so do not panic if you do not come across what you probably dream to have.

You don't understand that the developers need money to advance in the game and pay certain costs for development therefore they are trying to gain money that's why they use paint, premium accounts, token item boxes, and epic items worth tokens