(Not a bug, not a feature suggestion. Just feedback, and some frustration venting):
Unfortunately the new SlopStop, as currently implemented, is doomed to fail. I predict you will see the amount of reports drop sharply after some initial enthusiasm. (Of course I hope I'm wrong.)
Why? Human psychology. I think on average (which is what you need if you want to reach scale) humans are not wired to put in extra time and effort if they don't experience an immediate benefit to themselves.
Personally, and I can only assume I'm not alone in this, I'm unfortunately not 'motivated' enough to push buttons to report websites when all I experience in return is "Thanks, we'll have a look at it". When I'm searching, I'm prioritising another urgent need: searching & finding information. When I (quickly!) flag a website, it means I don't want to see it ever again. It should immediately be gone for me.
Also, there is no practical difference between AI slop and human (SEO) slop. I don't care who made it. I don't want to see low/no-quality websites (try the query "spotify suddenly stops" for example). Therefore, the process to remove/report both should be the same. Not push button A for suspected AI slop, and press button B for suspected human slop.
Which makes it make more sense to integrate the feature into the already existing 'rank adjustment' (personal filter?) feature. Now people have to press two buttons for two processes: filter and then also report. Which by the way would only work if the adjustment/filter feature hadn't become completely USELESS (to me).
Apparently, and unknowingly, I've reached some "1000 adjustments" limit, so I can't even use Kagi to remove slop sites from my results anymore. Which would be a 100% core Kagi functionality (Better Search)! More important than AI or Translate gimmicks/feautures. If raising the 1000 limit means too much load on the Kagi servers, you should imo invest in client-side implementations, like any common extension blocklist already does. You can then of course still use the lists of websites people block, as input to improve your algorithm for everybody else.
My current process to actually remove slop (of any origin) from my search is this (only works in a desktop browser unfortunately): I use the uBlacklist extension to quickly remove slop from my (future) results. Including entire domains like *.ru or * .pinterest. * for example, something Kagi can't do either. So the two features Kagi now offers don't remove any slop from my personal search results. The Ranking Adjustment broke down, and SlopStop is only a vague promise. Sadly.