Not true.
Show me the text that confirms that. I got a refusal from Tradovate.
If my son opens an account and I trade it, I am a professional. I can only trade my own account as my son is a third party.
Read remark G in the added document from CME:
The Non-Professional Subscriber’s Use of Information must:
(f) be solely for the Subscriber’s personal or private use;
(g) be limited to managing the Subscriber’s own assets, and
not be used in connection with the management of any
assets of any third party(ies) in any capacity
