[mjmas]

The ones at *.ec2.internal generally mean that the git config was never set up ans it defaults to $(id -un)@$(hostname)

[embedding-shape]

Indeed. Extra observant people will notice that the "Ubuntu" username was used only twice though, compared to "root" that was used +3700 times. And observant people who've dealt with infrastructure before, might recognize that username as the default for interactive EC2 instances :)