Ah, that's not likely to be found at any site really (that I know of at least). That model makes sense for governments, but for websites its not like you're able to vote in a new site owner (well, strictly speaking from an independent run website and not one that's run by a corporation cough Reddit - even then, you can't really just vote out Reddit Inc as a whole).

But, America was founded because they didn't want to be connected to a government they felt like they had no influence in, thus splitting off to form their own government - it's very easy to do the same for Lemmy (you could even go as far as Hexbear did, and fork Lemmy and maintain your own version).

I'm not familiar with any websites that are run in the way that you're referring to, but I'd be interested to see one and how it shapes up (even if I wouldn't be interested in running one myself), though I'm not sure how the logistics of it would work. However, I've seen the idea come up a few times in the past before so I wouldn't be surprised if there's one out there (or at least, in the past).

Personally I see the analogy is a a bit silly for a site that takes place in the Fediverse. If you break a law in most places, you get thrown in jail. On a Lemmy/Fediverse instance, if you break the rules you get banned - but can start a new account elsewhere and participate in the same communities (for better or for worse). This exact community isn't even hosted on lemmy.world, so the definition of "site" in the Fediverse is a much less important abstraction than it would be if you were to say, be banned off of Reddit, hence why I keep circling back to moving instances/standing up your own.