Even connections won't save you anymore. I have an account with over a hundred connections but now they want to see a government ID for whatever reason. Won't let me do anything on the website until I do.
I hate this, because that's probably a fake reason given by them.
Mercado Libre (the "latin american Amazon") did something similar to me: they said I enabled two factor authentication via ID, and blocked me from my account until I give it to them. After a lot of back and forth with support, they finally admitted that they picked random users for "some tests", and told me that there's nothing I could do about it. Maybe LinkedIn is doing something similar?