Those boxes are pretty tricky. Sometimes I got really good things from them and other times I got things that made me cringe. I expect the percentages to be low, but sometimes our own personal luck *s in. I have seen this happen in many games that have random number generation. Sometimes I will get a 95% chance of something happening, in say like the Sims, and that thing winds up never happening. It's frustrating and I can sympathize with that. All I can advise is to not expect much from random number generation and you are not going to roll a six majority of the time. Just focus on the fact that you can still get quite a bit of power from the packs, it will save you a bunch of grief. After all, in this game, power is more valuable than ninjas and the Lucky Board is giving away a lot of power.