I'm not sure if this is the source you meant, but patio11 wrote a good overview of various brokerages' revenue sources: https://www.kalzumeus.com/2019/6/26/how-

I'm not sure if this is the source you meant, but patio11 wrote a good overview of various brokerages' revenue sources: https://www.kalzumeus.com/2019/6/26/how-brokerages-make-money/ https://www.kalzumeus.com/2019/6/26/how-brokerages-make-mone...