breakage
n.— «Most consumers will not miss the advantages that rebates promised. That is because only the most diligent and fastidious consumers took advantage of rebates. Retailers and manufacturers intentionally made the process of rebate redemption difficult. They even have a term for it: breakage.» —“Rebates on the Way to Expiring” by Damon Darlin New York Times Nov. 11, 2006. (source: Double-Tongued Dictionary)