Seems like robinhood is some millenial daydream that they can do better. Soon they will put in place all these rules and costs and be like any other broker.
A big reason to stick with brokers run by and for real traders and industry types, and stay far away from those run by tech bro "disruptors". Poor risk controls and clueless customers means that a flash crash or black swan type event can put the whole business at risk.