Here you have to select your package that you want to buy and expected number of referrals. Then calculate your commission. The earning from the three packages will vary and it depends on the package that you are buying.
There is no limit on referals. You can earn money as much as you can from referrals and by selling products.
Choose package wisely because this will lose much of your income approximately 25% if you choose the small package.
This is earning of your referrals only but you can also earn more commission by selling the products to others.