I've never had any of those accounts. I feel bad about being logged into my YouTube account. I use that account as a collection of bookmarks=channel subscriptions. When I sign in in order to subscribe to a channel, I make sure to sign out right away. I don't want Google to know what YouTube videos I've watched. I have also never signed up for anything that requires me to provide a cell phone number. I don't Own a cell phone, but if I were to own one, I wouldn't want the owners of the service to actually know my true identity.