I think the rate at which notifications are sent to site users must be controlled by Admin, then users will have the choice to set the frequency and how they receive these notifications. If notifications are sent immediately, users return to the site often.
Some users have no idea or no time to set how they receive email notifications of site activities. And if the default is set to Automatic or never, it will harm the sites activities. This is really harming my site activities.
Like Facebook, if a user you have any relationship does anything on their pages, email notification comes quickly.
Oxwall Should immediately allow site admins to control how email notifications are sent to members.