PVP trading in arena in 1v1 duel to stack up rating?

[Shadownation]

So i noticed on PvP rankings, every 2v2 or even 3v3 is actually 1v1 to stack ppl's mmr to get free gear?
Isn't that violation some rules? For 1v1 there are skirmishes, arenas 2v2 , 3v3 and so on are to play some serious arena not to stack MMR for gear..
Maybe i overstep but.. That's not cool , and ppl just get free gear for no effort
I would rather make them pay money for donating then stacking they're MMR and Ego the place over...

I wont share screenshot sence i dont feel comfrtable provoking and calling out but that's just the way it is.
Sinceraly Stryxer.