Tell why you didn't call it a 50% referral commission.
Because it has the potential to be a lot more than that. Let's say you refer a key person in an organization, for instance, the owner of a real estate agency (your 1st level referral). You receive 25% of the profit from the paid videos that she creates to help sell her real estate. You will make a lot more money when she has all of her agents using OurVideoSite (your 2nd level referrals). Month after month, as long as they are using the service, you are being paid.