They really should have allowed 5 opens and only inserted the mimic after to punish greed. The orb is "supposed" to be a bonus/reward/prize afterall. In reality it's just another chore.
I wouldn't mind it so much, but I don't like gambling at the best of times. I usually only open like 1 or 2 and then call it quits right there. It doesn't help that I also don't like seeing my character get KO'ed.
I'd sooner they just gave us Gobbiedial #SP keys or something lol