I would like to make the suggestion that if someone uses a seal scroll, to open one of the seal treasures (not the free draw) that the minimum reward, whatever it be, be worth at least 1/4 of what the ingot/coupon cost of a seal scroll is, that way you don't get stuck buying a seal scroll, with your hard earned in-game currency, or your paid for in-game currency, to get a level 1 magatama... or 3 food pills... or 3 ninja boots...

my suggestion for Minimum Prizes, when using an earned or purchased seal scroll

Level 1 magatama kit (one of each level 1)
level 2 magatama kit (2 random level 2)
Level 3 Magatama
1000 cultivation rune
10,000 Coins
Awakening Kit (this would automatically awaken one ninja a step further)
1 Character fragment kit (would give 1 main character fragment, and 1 fragment of each "in Battle Ninja"
1/8th current level in XP
2 full stamina potions
1 day chunin medal bonuses (not benefits, but just the bonuses)
1 Free instance reset...

All of these things could be good minimum prizes, when using a seal scroll (not the free draw) given the cost of the seal scroll...