The terms of service haven't changed for an EXISTING program such as the trees. Sure...terms can change for usage of subscription features when you renew (it's a new contract), but an agreement for a program you submit your data to doesn't change after you have submitted. That's a big part of the reason (in my opinion) that AWT was retired rather than updated and a new tree program with a new agreement was introduced. That legally and ethically enabled changes as to the submitter agreement.
Joan