This is true of 99% of Hosted Games authors and about 4% of CoG authors. I think that needs to be taken into consideration as well. If mods treat threads on CoG games whose authors have never popped up here the same way they do HG WIPs whose authors are constantly present, it’ll inevitably look like they’re protecting the company from bad reviews rather than the authors from demoralizing, non-constructive feedback.
As a one-time mod myself, I know that the intent is to create a kind space for authors. But for CoG games where the authors aren’t forum members or known lurkers, I think we’d be well served to let readers vent their frustrations here rather than nudging those reactions to reddit.
(For my part, harsh reviews of XoR are always welcome here. The only unkindness that gets under my skin at all, in keeping with my general resemblance to GRR Martin, is people speculating that my game is abandoned or will never be finished. 
)