It's kind of a pay to win game like the Tengu and Stalker both needed money for the tokens or keys to open the crates and sometimes your probably need to pay more for a better chance to get the mech like only a few people get them and the others don't get to experience the new mechs they might need to wait to get more XP for the mechs you can get with acoins or credits. And kind of the same thing with weapons some were only available on the season gold pass thing which cost money :/