You earn IB/Affiliate lot commissions based on the trading activity of the clients you refer, as well as the trading activity of your 2nd, 3rd and 4th level clients.
The commission structure is:
Direct clients: $8 per lot
2nd level clients / from level 1 Sub-IBs: $2.40 per lot
3rd level clients / from level 2 sub-IBs: $1.60 per lot
4th level clients / from level 3 sub-IBs: $0.80 per lot
As your network grows across all three levels, you can earn commissions from the trading volume generated by each level.