Comment 1 for bug 1685974

Adding a note that, until a more elegant solution is created, one option for an Evergreen site might be to ensure that each notification method is contained in a separate trigger and then use the opt-in settings to allow patrons to opt in or out of that notification method.

This method wouldn't allow the user to select when they received specific messages, so it definitely would be worthwhile to explore a better way of allowing users to opt in/out of messages.