My experience is that when I sign up to a service with a previous account, the previous account tells me what data the new service will have access to, and then

My experience is that when I sign up to a service with a previous account, the previous account tells me what data the new service will have access to, and then the new service has a couple of more steps to fully create a new account. In this example it was "Log in with LinkedIn" -> immediately to the front page. I've never had that before.