You had to have played the game longer ago. Supposedly, when they added mods, you could use them on 3 star mechs. I guess after a while they felt it imbalanced the game, so everyone that had it unlocked was able to keep them, while all us new users have to wait till we can get 6 star mechs. So us fighting 3 star mechs with mods is supposed to be "balanced" now. And according to them, the amount of players with mods on anything but 6 star mechs is in decline, even though I see them every day. And for me in tournaments, just about everyone except me has them. I did say just about since the new users numbers are small compared to all those older users with them. The comunity manager said they aren't looking into changing it back, but it was a question they asked in the official feedback forum on their Discord forum. Everyone said it was unfair, but they still did nothing. I still say that mods on anything other then 6 star mechs right now is outright cheating, but the people who make the game, don't understand that word.