Brokers keep 100% of their commission on deals submitted through the platform. Any agreement you already have with a lender stays between you and that lender, and existing lender relationships and broker-of-record terms are set by each lender.
Before you submit a client to a lender you already work with directly, check with that lender about how they treat broker of record and renewal commissions for deals that come through the platform. Submitting this way adds AI matchmaking, autofill and in-portal messaging on top of the relationship you already have.