[supertrope]

There is enormous pressure to converge on one identity. IAM has huge network effects. On-boarding customers is an expense so businesses and governments rely heavily on existing rails like email, SSN+DOB, Facebook, SMS, etc. If you don't want to surrender SSN or your whole Facebook profile your only option is to reject the service entirely.

[mirimir]

Facebook accounts are available for $1-$10, payable in cryptocurrencies.

[Schiendelman]

More like $25-50. But even then, it likely doesn’t have the attributes attached to it that you want if you have a particular target.