Abstract: A computer includes a processor and a computer readable storage medium accessible to the processor and bearing instructions executable by the processor to cause the processor to determine whether to apply a basic discount to an account of a seller of products based at least in part on determining whether the seller has adhered to a seller agreement. The instructions also cause the processor to determine whether to apply an efficiency discount to the account based at least in part on determining whether at least one efficiency metric has been satisfied, determine whether to apply a strategy discount to the account based at least in part on whether at least one strategy metric has been satisfied, and determine whether to apply an execution discount to the account based at least in part on whether at least one execution metric has been satisfied.