This is positioning them to increase prices. CS is tired of discount brokers like Ameritrade under-cutting them, so they're going to try and buy out a handful and see if they can pay for it with fee increases.
How long until Robinhood gets purchased? I'd be surprised if it wasn't consolidated this time next year.
This must really hurt for E-Trade. They're getting boxed in on both sides now, with Robinhood beating them in the discount brokerage market and the soon to be Schwab/TD on the premium side.