From my understanding of how the subscription works, the people that have received the shared links should be able to view them even after your subscription has expired. Let me check with the team and get back to you.
Hi, I'm answering all of your threads in this one reply!
The prototype links will stop working once your team account is disabled.
Unfortunately there is currently no way to transfer prototypes from one account to another, and neither a way to copy comments from one prototype to another. As Preran suggested in the other thread please file a UserVoice request for copying comments between prototypes so we can keep track of the request.
For your case I'm afraid the only thing I can suggest is that you re-share the file using a new account that is not getting disabled.
 Note that disabling an account is different from a subscription ending: if a subscription ends but the account remains active (as would be the case with a personal account that stops paying for CC) then, at the time of writing, the links will remain active.
Thanks Preran and Stuart -- I will add my feature requests to UserVoice.
And just to clarify, the team account itself will still be active, however they will not be paying for my seat any longer (my Adobe ID, i guess). I assume this is your definition of "disabled". If so, then it does look like I'll have to re-share any important prototypes using my new Adobe ID account. And I'll have to copy and paste (one by one, by hand) the posted comments from the existing prototype link into the new prototype link.
I wish there was an easier way, but I understand there isn't at this time. Thanks for getting back to me!
PS: I think XD is a great product, it's worked out great for wireframes and even for visual mockups.