They got hit with a $65M SEC settlement for this last December: https://en.wikipedia.org/wiki/Robinhood_(company)#SEC_Probe_...
This is a clear case of "if you're not paying for the product, you are the product".
This is a clear case of "if you're not paying for the product, you are the product".
https://www.bloomberg.com/opinion/articles/2018-10-16/carl-i...
Maybe Citadel's updated their position but I think it's still shorter-term bearish.
And the OP is right, the trader is 100% the product in this scenario and the trade stream buyers are the real customers.