Concerning "Each Coin you pick up gives you +{0}% of your current CpS."
I am in opposition to the construction of this string, having the plus sign indicate the cumulative aspect of the upgrade. I would rather the plus sign be omitted completely, and instead the description be rephrased. This can be achieved by adding one introductory upgrade, i.e. "You gain a bonus" followed by "Increase the bonus" upgrades, which system is already used in other places.
#"Each Coin" upgrade context
humble ingot
raw star
Is this cumulative or multiplicative?