I actually wasn't even aware of it, likely for the same reason I couldn't understand you here: people seem to refer to both the Wikia and Harem-Battle resources as "English Wiki". Looks like it became more active in August 2017, which is long after I was looking around for English resources. I mainly use the JP wiki, so I'm not as well-connected with English resources as some of my users, apparently.
I added it to the survey. That question should've had an "Other" option, and I've fixed that as well.
I also updated the Useful Links and Resources section of my guide with the Wikia, as well as short descriptions of what I think are the useful aspects of each resource.
I'll likely begin processing accounts this weekend. I've currently received 25 responses.