Hello!

Selling and Buying Summon Chakra ranges from a minimum of 20 coupons to 30 coupons if my memory serves me right. Though the conversion rate of Ingots to Coupons is 1 is to 1. Some other people use it as a way to give coupons to others when their groupmates are in dire need of coupons.

Anyways, for this matter. There's a way to give coupons if you really want to. Recharging during Red Envelope Event allows you to send red packets of coupons to your groupmates although the amount relies on how much you recharge. Thank you.