Giving Back / Investing in the Community: Your membership with MSS not only provides you with a significant savings but also helps support your local community. For every dollar you spend on MSS, 2% will go back to the charity of your choice (Schools and Park and Recreation facilities must be a member of MSS to obtain these donations). In addition to your specified charity, MSS will donate 4% of each membership fee to our national charity: Juvenile Diabetes Research Foundation.