Those are itpp2012's windows builds I believe he is a admin on the mailing list.

https://forum.nginx.org/profile.php?11,7488

Under all his posts it says he is a admin.

I have used his builds you can download them for free... Just like nginx mainline builds from nginx.org But specific custom features cost money just like you would have to pay for Nginx+ https://www.nginx.com/

But this is the latest build it seems http://nginx-win.ecsds.eu/download/nginx%201.11.10.1%20Lion.zip That comes compiled with everything you see in product files.

http://www.networkflare.com/