Yes, I believe google deleting "market manipulators" review is equal to the Cultural Revolution. How do you really feel about that?
"Selling the data they collect" is a fun way to downplay the fact that they - posing as an unbiased middle man here to allow unsophisticated investors to trade for cheap - are selling it to people who can profit off those same trades.
Fiduciary duty to investors? You mean muppets? how can we buy so much cocaine and sex if we has that?
If lawyers tried to run a scheme like this with their clients' funds, they'd be disbarred in a year, if not sooner...