I havent seen that since february...my suggestion is that u put a seal scroll and summon scroll not at the same time...and frags of ninjas like from tendo,kage and edo treasure for people to buy and u limit that like 5-10 frags...also the shop will refresh loke twice a day so the ninjas will change and that way we can by frags for ninjas that we may need or may not depends on which ninja do u need. My example is edo treasure because the ninjas are mainly 2 star so it would be good addition and people will actually spend there.