Because one can never have enough Acme modules...
This module was created back in 2010, but was subsequently removed from CPAN by its author, who wanted to better separate private and employment related matters. Although I liked the idea of Acme::CPANAuthors::Booking, I decided to respect his decision and didn't ask for CO-MAINT.
However, I happened to still have a clone of it on github from my past contributions to the module, so when SEVEAS wanted to send a pull request for an update, my clone was the only repository he could find. Now that I had actual pull requests, I knew I wasn't the only interested party, and finally asked for CO-MAINT, which I was graciously given a few weeks ago.
With today's release, the adoption process is now complete