All it states is that you must log into your DJI GO account if you update DJI GO and/or the firmware. The vague part is the changes that were made that require the login.
Are we seeing two different screenshots? Can you please post a screenshot of your dji go app where it says that you only need to re activate if you performed an update because this one clearly says ALL customers HAVE to reactivate or you WILL be limited and doesn't mention anything about having an option.