To answer first question: I gave a quick look at your list, which seems not working (says many users, but displays non) due probably to some errors in the database. Check CB + Fields + Plugins database first. + I can't reproduce here, works fine.
To answer your second question: When time doesn't permit to answer all posts, we do give priority to people helping the project (e.g. answer in forum to other's questions and other community members.
So yes, often a Doc subscription helps in getting answer faster, although it's NOT a support contract with SLA. But posting dozens of answers helps too to get community support back too.
I edited your post to remove the link, as your site's advertisements are not for all audiences, which this site is.