The recent change to some reward boosters to "Timed Booster" rewards is extremely frustrating. My suggestion is to go back to reward boosters that do not have a time limit to use them. More times than not, the timed boosters are showing up when I only have 1 life left and in some cases when I have no lives left and the booster times out before I get another life. It is extremly frustrating and over time it has effected my interest in the game.
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