Future $: Average total rebill revenue earned by the affiliate due to sales from a site. Generally this equates to the average sum of all rebills.

每推销一个产品获得的收入的平均数，注意这个是际销售所得的平均数，所以他受（退款，营业税，短期销售）影响，短期销售，例如退支，影响这个数字。