Marketing is a separate matter. Usually member's choice or many use the store's own pools.
There's normally a rebate that is distributed to members, which is from additional profits from extra use of the store, cheaper fuel than budgeted etc. Some stores may retain the surplus for expansion or improvements, others may return it to the members. Usually a mixture of both. Frequently, the rebate exceeds the operating charge but this really varies from year to year and store to store. High rebates might mean the store isn't doing much maintenance e.g. painting silos that extend the store life.
There's normally a rebate that is distributed to members, which is from additional profits from extra use of the store, cheaper fuel than budgeted etc. Some stores may retain the surplus for expansion or improvements, others may return it to the members. Usually a mixture of both. Frequently, the rebate exceeds the operating charge but this really varies from year to year and store to store. High rebates might mean the store isn't doing much maintenance e.g. painting silos that extend the store life.