True, and organized well [only three here] they get more attention IMO. But so often folks want a custom-tailored answer vs. reading and researching more - and some don't.
FWIW, I'm only an outside influence here ... I don't moderate this forum - just come here to have fun

I can't sticky it for you, and prefer to let the forum mods make all decisions.
No offense intended, but it's not in my job description

[if you want SPS stickies, I'd be in on that]
I think a difficulty will be differentiating popularity with quality-rating. Most folks like their skimmer choice, a lot of folks have only tried a few [good ones, that is] and once things start going right, people tend to like their equipment.
Over time, I've seen a number of names/models become very popular, often to decrease over time + end up with more mediocre reviews than the seemingly 100% happiness that people reported earlier.
I would perhaps add a `adjustability' and or `thrives under regular/daily maintenance' category.
Reason: I loved my beckett skimmer - when I had time to regularly keep it clean/adjusted ... the amount + nastiness of what I could get out was astounding. But it had that time-overhead, which when my job required 50+ weeks over the summer, I no longer had the time. If I had time again, I'd probably run it again -- but some equipment works best while regularly tweaked/etc - and some is auto-pilot stuff [that can lack adjustability]. I don't consider that skimmer a lot of work, just regular attention [sorta like what the probiotic folks say about that method].
But IMO - something should be acknowledged here. I like tweaking, and thus the only negative to the beckett is my work schedule ... and the adjustability beat any other skimmer I've run, so some sort of gauge here IMO could be a useful [but difficult] category.
A good idea, don't let me rain on your parade
