http://status.nowherejezfoltodf4jiyl6r56jnzintap5vyjlia7fkirfsnfizflqd.onion/productivity/mentalopti/index.html
Just disable them, systemwide, as most likely none of them are truly urgent. If there is a place where you can expect to get urgent notifications (like your mails for example), keep it open on a workspace and periodically check for new alerts whenever you feel like it.