Right now, the People tab of a project is not dynamically updated to people actually in that project. Anytime someone is added to a task or issue in the project, they are added to the People tab (or are the PO or other reasons). But then they remain in the People tab even if they are removed from the project tasks. If they're opting into getting 'updates about projects I'm on' then they are getting these unnecessarily. This is a big issue when it comes to projects that act as the projects receiving issues/requests - those projects will never go away as long as we have the request queue feeding it, but more people are randomly added to the project and after a while they aren't needed to be there but are still getting the notifications.