You advertise your referral link and someone visits our website. He makes an investment of 0.1 BTC, after which our system automatically sends you the referral commission to the BTC address which you have used in the link. Your payout in this case is 15% of 0.1 BTC which is 0.015 BTC. Yor referral gets his 0.2 BTC payout after 10 hours.