I've always felt that if I'm going to engage in the – let's face it – rather strange game of reviewing and rating other people's stories, I should allow them to do the same to mine in return, should they so wish. Actually, I think that in general it's better if ponyfic reviewers take this approach. The easiest way to do this is, of course, to have your own stories out there for people to comment on. This is in fact the usual practice.
Consider: the main individuals still in the "regularly reviews ponyfic" game are probably Present Perfect, PaulAsaran and me. Including these three and a non-exhaustive bunch of high-profile reviewers who've now moved on, the published story counts are, with active reviewers bolded:
Present Perfect: 96
PaulAsaran: 69
Foals Errand: 48
Titanium Dragon: 43
Loganberry/Louder Yay: 30
Chris/One Man's Pony Ramblings: 21
Soge: 8
Singularity Dream/City of Doors: 3
Of course, this isn't everyone, as lots of people have written at least the occasional ponyfic review in a Fimfiction blog or wherever. There are also the more substantial contributions from the members of the Royal Canterlot Library, Seattle's Angels and – now we're going back a bit! – The Royal Guard. All now moribund-to-dead in 2022-world: indeed, in the case of TRG, their Fimfiction group has long since been entirely removed.
Although I can't cover everyone, I do want to mention one more person, who is in a kind of class by himself. That is Pascoite, who remains very active. Although he keeps the amusing "occasional author" line in his Fimfiction bio, in fact he beats all the others mentioned here with 98 published stories – the last uploaded only a week ago. He doesn't review ponyfic much now,1 but scroll through enough anime review posts and there's still the occasional Underappreciated Author Spotlight, so I'm going to bold his name here.
1 I don't count pre-reader feedback for Equestria Daily, since as a rule that is not public
I do allow and indeed encourage mini-review feedback (within certain limits) for the monthly Flashfic 150 contests I run, but there is no requirement to have published ponyfic to give those. I do very occasionally submit a non-competitive flashfic myself, though. There's also the whole other area of YouTube and the like. I tend to find video reviews frustratingly slow to get to the point, so I very much prefer text-based thoughts, which is a major reason I'm not considering video reviewers in this blog post.
It's interesting that all the reviewers I've mentioned have at least a few published ponyfics, and most have a total well into double figures. I can't speak for any of the others, but I think I would feel rather uncomfortable if I was pronouncing on other people's Pony stories but not giving any kind of "comeback" – sure, they're able and very welcome to comment, but I rather like that people can look at my writing and see that I'm neither completely illiterate nor a Nobel Prize candidate.
Ponyfic isn't everything, of course. I don't think there's any way to get a total word count for Louder Yay, but I'd be willing to bet it greatly exceeds the amount I've written for all my fics combined. I always leave comments open on here, so that's also a way of allowing people to have their say on what I've written. The question of "why review anyway?" is a different one (and one I may return to) but for me, at least, if I'm going to dish out verdicts then I feel I should be able to take them as well.