I'm pretty sure it was an error, but regardless, I think it's good.

Due to this, I now have 4 ninja I've obtained through events

1st-100 puppet Sasori, May Mission boxes (1/20 coupons, had a few pulled previously)

2nd-Tendo, June Mission boxes (55/40 free, 300 coupons)

3rd-Tobirama-August mission boxes (10/200 coupons)

4th-Minato-September Lucky Wheel. (Around 300-500 coupons)