Non-Self clearing fims

How do non self clearing firms without their own front end technology attract traders and make money. Thank you in advance for your responces.

 

they are called broker dealers or Introducing Brokers

 

leverage.

 

I'd say there is a variety of ways they can and do make money.
They can provide the technology, or the "pipes" for straight market and ECN access. They also can provide other things like algos, smart routers, or research; or execution services....they make their money on volume, primarily.