I think the description on the coin multiplier upgrade cards need to be changed. Say you have a coin multiplier of 15, and you purchase a card for a 100% upgrade. Mathematically, that would mean that your new multiplier would be 30 (15 + [15x1] = 30), which would make sense given the extremely high price. What actually happens is you get an increase of 1 multiplier unit. This should be stated on the cards. I feel as though I wasted a lot of iMG because of this.