I don’t necessarily see Dragon Prints as a sign of quality – it’s a sign someone clicked, not that they read it. I guess at most it says “This summary/codes/title/pairing/fandom was appealing” and a big multiparter, where the parts are posted at intervals rather than all at once, will often have many more hits than a oneshot purely because each new chapter will bring it back to the front page, but it doesn’t necessarily mean it’s any better. The oneshot could be amazing!
For the celebrity thing… eh, I’ve said my bit on why I stopped doing ‘em, so purely in line with this topic - I sometimes think with celebrity stories folks don’t want to be commenting/reviewing positively on something the celebrity might have a lawsuit about later – but I guess the same could apply for many copyrighted works. I do know that if, say, I commented on a rape fic about a celebrity and them someone linked them to it on twitter, or a talk show host bought it up (as occasionally happens, it ain’t just mean tweets! Or, hell, a lot of these folks are waaay more into the internet than before, prolly find thm theirselves) I’d feel pretty bad for ‘em. Maybe other folks think the same thing and are less keen to have their reviews in that context, but quite happy to masturbate over it? But even that theory doesn’t hold up because there are people out there happy to use internet anonymity to tell someone to their twitter/IG whatever account that they hope they get raped/murdered/not allowed to be in another Star Wars movie. And those angry folks seem like they’d not be bothered reviewing celeb porn. Hell, some of ‘em are probably making the deepfakes.
Having a quick look at yours, I see that three of ‘em only have one part, and the other one only has two parts – every single one of my unreviewed stories is a oneshot and I think that can have an impact as well, maybe more so than the domain thing (unless it’s a nosex multiparter in a really unknown fandom with other really niche tags or something!). Might even be more that factor than the celeb factor, because as you have with your big multi-parters once you get regular readers they’re keen to offer input, and feedback and interact, and guess about how things will go and so on. Just a thought.
When I was writing celeb stories I got the vast majority of my reviews by email, maybe you’d get some by sticking a “Hey folks! If you don’t want to post a review, email me your thoughts!” message?