Dear Lydia, Mathieu, Nicolas and All, 

I'm seeking a clarification here to "An answer to Lydia Pintscher regarding its considerations on Wikidata and CC-0" re the implications of CC-0 licensing for Wikidata say in comparison with CC-4 licensing.

If CC-0 licensing allows for commercial use - 

"Once the creator or a subsequent owner of a work applies CC0 to a work, the work is no longer his or hers in any meaningful sense under copyright law. Anyone can then use the work in any way and for any purpose, including commercial purposes, subject to other laws and the rights others may have in the work or how the work is used. Think of CC0 as the "no rights reserved" option " (https://wiki.creativecommons.org/wiki/CC0_FAQ ) ... 

... and, by contrast, CC-4 licensing (say by MIT OpenCourseWare in its 7 languages, for example, - where its CC-4 licensing allows for "sharing" "adapting" but "non-commercially"), what would CC-0 Wikidata licensed databases allow for commercially? Since Wikidata, or Wikisource or Project Wikicite in particular, for example, are licensed CC-0 licensing option, could (CC) Bookstores, for example, use this CC-0 licensing, in all 295 of Wikipedia's languages, for the books in their (online) bookstores? (Also are there any data, or sister projects, affiliated with Wikidata that are not CC-0 re https://www.wikidata.org/wiki/User:Lydia_Pintscher_%28WMDE%29/CC-0 ? )

Thanks,

Scott