Who and where are Nabu Press?

A quick search shows that Nabu Press has about 600,000 books listed on Amazon, all public domain reprints (similarly to General Books LLC, an imprint of the alleged scam publisher, VDM Publishing). There's no website for Nabu Press and their books do not have any contact information. Turns out that Nabu Press is ... BiblioBazaar / BiblioLife, a company started by former BookSurge partners after they sold their Print On Demand company to Amazon. No surprise then that they print their POD books through Amazon.

Take a look at the SC filing for Nabu Press LLC. The registered agent is for Nabu is:

ERIKA V. HARRISON

18-A CAROLINA

CHARLESTON, SC 29403

A search of the same site, reveals that only two other corporations have the same registered agent - BIBLIOBAZAAR II, LLC and BIBLIOLABS, LLC. BiblioLabs is part of BiblioBazaar as stated on their website. So the final word is that Nabu Press is actually part of BiblioBazaar. HOWEVER, why did they NOT mention this on their website, and especially in the list of their imprints here on Amazon?