It's quite frequent in certain industries with high volume/low unit prices, to have a rebate agreement based on quantities. The rebate management amount needs to be precise (up to 4 digits) - 0.1255$ per unit sold for exemple.

This new features would allow to setup a rounding precisions in the Rebate Management Parameters, where we can define how many decimals places we'd like to have in the Rebate Management amount field.