A long, complicated story, summarized: (apart from Tildes, on which I lurk) I swore off all social media years ago. Then my job required that I have an account on LinkedIn. I reconsidered, and attempted to make the least disclosive account possible in an effort to protect my privacy. Things aren't going well. Despite logging in with the correct credentials, on the same device, using the same browser; and with access to my signup email, and access to the phone I used to enroll, LinkedIn has flagged my account the second time I tried using it and now requires me to upload images of myself and my government ID to regain access to their cesspool. Are you familiar with their protocols and can share insights, so that if I start again I don't face the same problem?

I have read what LinkedIn says and I have read discussions on Reddit on the topic. LinkedIn says you can opt to "use your work email" or mail them an affidavit. These options were not given to me. Everyone else I have seen reporting facing this seems to have triggered the system by losing their login credentials or moving countries; what brought this upon me and can I avoid it?

1. Is it that I use a VPN, and it may have routed through a different IP address on the second login?
2. I use an email alias. Is LinkedIn purging accounts with email domains that offer aliases?
3. Is it a result of clearing cookies?
4. Is it easier to maintain a Google account (!) which LinkedIn allows as login without this ID thing coming up?

Please be gentle with your advice as I am kind of panicking.