Yes, you can refer other affiliates to the Pips Markets Affiliate Program and earn commissions from their networks as well.
You are rewarded on four levels:
From Direct Sub-Affiliates (your 2nd level clients), you earn $2.40 per lot based on the trading activity of the clients they refer.
From 2nd Level Sub-Affiliates (your 3rd level clients), you still earn $1.60 per lot from the trading activity of their referred clients.
From 3rd Level Sub-Affiliates (your 4th level clients), you still earn $0.80 per lot from the trading activity of their referred clients.
This means you can build a multi-level structure and earn IB/Affiliate lot commissions not only from your direct clients, but also from the clients of your sub-affiliates on level 2, level 3 and level 4.