RNG ninjas can be quite hard to get. You might even not them at all, no matter how much you spend. For example: Kaizer tried to get kage Minato from wheel, used max every day whole week and didn't get him. He had to wait till Minato was for sale.

I read that message as literally as I could: "A" chance to get him= 1 player only could get him and it's not guaranteed that even that 1 gets him. That way I can belive that message about jinch Obito in event.

Lucky stars wheel.