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Re:Robinhood stock trading app confirms $110M raise at $1.3B... by usefulcat on Wednesday April 26, 2017 @02:56PM (#14205892)
According to TFA they also make money off of rebates, which are proportional to the number of shares traded.
Re:Robinhood stock trading app confirms $110M raise at $1.3B... by matt_wulfeck on Wednesday April 26, 2017 @04:19PM (#14206596)
So then they make money of both.