Trust me, there are times I feel like I shouldn't even bother with Mog Bonanza. I at least make sure I get all 10 balls to end with a different digit, guaranteeing me a Rank 5, but other than the one time they did a Mog Bonanza at a Vana'fest in Japan a few years back(you only got 1 ball IIRC) I got Rank 3 and got my Adamantoise Egg (completed Black Belt)
But there's a saying that goes like this: "You can't win if you don't play."
Also to note.....I'm the guy in the "Ebisu Bitching Thread" that went 1/2,642 on getting a Saber Shoot from a Gugrusaurus. How's that for shitty luck?