This is actually one of the dumbest parts of this game. Why are some people saving up 10-20k coupons over months while some people get it through wheels. It is a game breaking problem as it ruins the balance especially among f2p players.

Suggestion- 5 frags as jackpot but more common. Run 80 frag reward on ingot events like consumption wheel, arena training recharge wheel etc...This is so that those who slowly piece frags together can gain some progress, instead of randomly handing out full ninjas.