no, don't know what kind of mess they made; the official login is via SSO (and works with <companyname>.zoom.us). to my understanding the account is typically created on login there (otherwise we would sync our whole list of employees with 100s of services...). and even if it was just a random invitation sent to an email they bought somewhere, it doesn't really explain how I could reset the password for my email then (without ever activating an account)?!

It might be a messup from someone but it's definitely strange and I just didn't sign up there, yet got spam and had a working basic account...