Let's be real, skongers... Plus website update.

I'm gonna start with my main point, and it's that this ARG or whatever mystery this is - is in no way connected to Silksong. We have E1331 to silkpost about, that's where the "real bait deal" is.
The Mongoose Rodeo post does uncannily reminds of the picture on the website, but the signs in the post "📣🖕🖖📢" aren't actually referencing anything on the site/picture. Something like 🕸️👌 or even 🙏 emojis would fit more. Their post (as well as the website pic) also resembles of Chaos orb from Path of Exile 2, is it a 3 game collaboration now? I just wanna say to keep your silksanity in check.

Skong aside, I do have some discoveries about the topic of the subreddit.

Inspect element or F12 will show you pretty much the majority of underlying code used in the website, which is very barebones.
We can see that website uses google analytics, so it seems to track some of your actions/stats on the website, I'm not entirely sure to what degree this can be used.
More importantly, DevTools lead us to hidden snippets of code and some hidden texts.
You can find konami script in there, obviously taken from this stackoverflow due to it being pretty much the only part that's properly commented. Inputting the famous konami code with arrow keys and keyboard (up, up, down, down, left, right, left, right, b, a, b, a) changes the background to hypno spiral gifs and plays music "In Between Days" by The Cure.

How it looks after the konami code and activating \"cheats\"

There's also some text in French that doesn't usually show up, one is a commented (non-active) alert in konami script "Enfin un vrai geek !" which roughly translates to "Finally, a real geek!". The music that's played below the picture has "Allez sur un autre navigateur pour la musique" which is just "Go to another browser for the music." I'm assuming in case of playback malfunction. I also wanna mention that I haven't been able to identify this song, it might be a custom piece from FL Studio.

With this you can pretty much just snoop around the websitie, even if you don't understand HTML it should be pretty easy to find random things, most useful tabs (at least for me) in that F12 menu are Elements and Sources.
Here you can find that some websites have differently named pngs for the label on top, for example "zaks95.png". Or that the main picture with the dude is named "chat.jpg".

The music that's available in the bottom of the website is named "feature.mp3", while the konami code one is simply named "konami.mp3". I've tried downloading them both to see what they show on a spectrogram, seem to be normal, the konami.mp3 is pretty much identical to the publicly available song.

Anyways, I don't think I have the energy to dig stuff deeper, nor I know the direction of what's next.