Cam Plus Unlimited - do other users sharing the cams have to opt in to Cam Plus Lite?

I have Cam Plus Unlimited on all my cameras. Those cameras are shared with various family members, who have been getting reminder emails and pop-ups to opt into Cam Plus Lite “or else”. I’m trying to find out whether they actually need to do that, since every camera they have on their accounts are mine that I’ve shared with them, thus are covered by my Cam Plus Unlimited subscription.
Should they ignore these alerts? I don’t want them to have issues with what they are able to see on their end.

I dont aee how they can si nce your the master and there just sharing the same cameras