I find it interesting that every time I play, and every time any of my coops or anyone I know has played on this Birthday Gwen game, we have received the bonus only on the 9th shot. I don't mind as long as everyone knows, otherwise it is deceptive. Statistically speaking I already know all 9 prized do not have the same chance of winning. So it is either unlocked or weighted somehow. But I see no rules or ToS or disclaimer (as is required by law) to those that invest in these shots.
Again, I'll likely shoot all 9 and refill anyway. But I've had several people complain that they have never hit the center after they invest in just enough crowns for 5-6 shots. Just giving you a heads up before INNO has a bigger problem on their hands.