There's a very strong hive mind there. It takes very little to grassroots a subreddit. Just like at the biking subreddits and tire recommendations. It's almost always the GP 5000 that is recommended. Which, don't get me wrong, it's a great tire. But it isn't always the best, and there are tires out there that beat it. The community has just latched on to the one true tire and that's all you'll ever see recommended.

Most subreddits that do any sort of product recommendation have the same problem. For a while, the pilot metro was the fountain pen de jure, or Stronglifts the default recommendation for weightlifting (and now it's never recommended).

If they hive mind rallies around products like this, it also rallys around other ideas, policies and whatnot. Just look at the politics subreddit and see nonstop "Israel bad" "Chuck Schumer is feckless" or "jews control the funding of the democrats" everywhere. Even where it doesn't make sense. You can have one of those muckraking websites that run an article like "Schumer didn't vote against [insert house bill]" and it gets to the top and the narrative is relentless against schumer, even though he literally can't vote against a house measure since he's in the senate. Is he feckless? Absolutely. Does that mean everything he does or doesn't do is a sign of his fecklessness? Absolutely not.

In the hivemind, there's no room for nuance, it's all "look at that bitch eating crackers"

Reddit is a pretty extreme example, though, where mods are basically subreddit dictators. For whatever reason, Reddit gave enormous amount of censorship and conversation-shaping power to mods, to the point where a handful of like-minded mods can enforce in great detail what is allowed to be discussed and what isn't.

Pretty sure if you unmasked the subreddit mods, the reason for the "circling around a particular brand recommendation" observation would become clear.

What you are describing is not hivemind, but rather paid participants. Companies pay for these "grassroots" recommendations, and Iran pays for those Jews posts.

It used to be more subtle with real people paid to post, but AI has made the quantity of it skyrocket, to the point where you can start to notice it, if you pay attention.

For example you'll see some comment about Jews, and very rapidly a bunch of upvotes. And you'll see a very similar comment elsewhere, with the same upvote pattern.

I've cut back quite a bit my participation in these types of sites once I realized just how many of the "people" I'm talking to are actually bots.