Thats why they are called OTC derivatives bro. They are a financial product offered by your broker. Not by their liquidity provider/s. How they manage their risk is their business. They (ie all retail brokers regardless, STP/NDD/ECN) are always the counter party, making all retail brokers market makers.
And ToS is not a PDS. If your broker only offers out ToS then steer well clear of them.