The purpose of this page is to have an entry for Asus Tinker Board in the toplevel overview.
Whether the C201 wiki page and Tinker Board wiki page could/should be combined, or a seperate Tinker Board wiki is justified was unclear when this pointer to page was created.
DebianOn is an effort to document how to install, configure and use Debian on some specific hardware. Therefore potential buyers would know if that hardware is supported and owners would know how get the best out of that hardware.
The purpose is not to duplicate the Debian Official Documentation, but to document how to install Debian on some specific hardware.