While the addition of new items that do not require payments to obtain are welcomed by users who do not purchase tokens, Tacticsoft relies on token purchases from SuperMechs and BattleDawn to make these games worthwhile to maintain and develop, as these games are free-to-play. While some such items are added occasionally, the reason why the majority of items that give an advantage over other players require payments to easily acquire is that such items encourage users to purchase tokens, thus increasing the profitability from the game, which is the main goal of the company.
Hope this helps.