The setting (design) of the gacha rewards is off the mark.

Hello, this is the result of using 396 coins.
Well, I didn't use it much so I used it to test it out, but this must be a design error in the reward drop.

Converting coins to stamina, 396 coins for 46 stamina, that can't be right.
Perhaps they use the same table for the probability of spinning for free and the probability of spinning using coins, but no one likes to go out of their way to convert coins into a small amount of stamina!

At the very least, it has to be more stamina than coins.
Still, if permanent coins become stamina that disappears in a day, there is no particular disadvantage, even for Mr. Seaart.

If you intend to make users consume the coins they have, this design would miss the point!