Yes, this site has unquestionably unique content not available on any other site in the category.
This is the reason for exclusion given by the editor in question.
My motives for building the site are my own and speculation about what they are shouldn't form the basis of a decision to exclude a site. Hence, I still maintain that this is a case of personal prejudice and bias.
I will not bother with the resource zone because I really don't need the ODP on this one. However, this whole issue has made me question both the validity of the directory as a whole and makes me skeptical about the future of the ODP. I believe that the project is doomed to mediocrity as long as personal prejudices are allowed to run rampant.