"They" are in the process that saying you are not allowed to developing or sharing trading information to exploit the market. It's piracy. The market is "they"'s. You should not do anything in it that they disapprove. It is not your property. It is just same as you should not do anything to you phone. You can only drive a car and go to designated dealer to do work on it, never yourself. You should not run any free software on a computer. It's "they"'s.