For the amount of trading you do that is probably the case. For many experienced traders it amounts to real money.
Yes, Schwab International. Not sure about Fidelity. API: yes and they are in the process of acquiring thinkorswim
Unfortunately, Schwab is currently only available to new clients from a select handful of countries in Europe.
Robinhood is growing substantially faster than that. That growth doesn't say anything about if Robinhood is a good broker for anyone here.