My 10 packs are 9.99 because I spent more money than my friend, his are 2.99 each, so the game tracks your spending and gives you offers based on it. I would have bought all 10 2.99 packs but the game wanted to be greedy so they get 0.00 from me. If you win too much, the game starts cheating for you to lose. I get 90% win rate and immediately lose 8 in a row. Units start attacking stuff on my end for no reason, ex a dog runs straight to my resurrection bomb and ignores all other units.