Yes, the OSS Sonatype repository restricts upload access to group IDs for DNS names user own. I own gladwell.me, so if you wanted to use this pull request you would need to create your own user account registered against your monkey.org domain as detailed here:

https://docs.sonatype.org/display/Repository/Sonatype+OSS+Maven+Repository+Usage+Guide

Sorry, I should have included this in the original merge comment.