This document summarizes the membership benefits for different card levels offered by Jcs, a loyalty program. Membership levels include Standard, Silver, Gold, Platinum, and Diamond cards that provide increasing cash rebates, discounts, postage exemptions, and point systems with longer membership durations. Higher card levels offer greater savings, such as 8% discount and 16.15% average savings for Diamond members, compared to no discount or 0.05% savings for Standard members. Benefits are realized through cash rebates, point systems convertible to gifts or cash, and postage/purchase exemptions.