Sooo I decided for some reason to open up the HTML on the users page (hahaha big number go brrrrr) and noticed that Platinum has a CSS class defining it as "master".

Going to the stylesheet for this site, it's a massive lump of text.
Like, seriously, big lump.
Idk if this is standard, since I don't really do this stuff, but whatever.
Ctrl+F is a beautiful thing.

Anyways, adding some spaces for readability, this is the relevant part for ranks:

.user-points.noob
{border:1px solid #aaa;
padding:1px 5px}

.user-points.bronze
{color:#fff;
background-color:#786113}

.user-points.silver
{background-color:#797979;
color:#fff}

.user-points.gold
{background-color:#e4b84b;
color:#fff}

.user-points.master
{background:linear-gradient(#111,#444) #333;
border-radius:0;
border:solid 1px #555;
color:#fff;
font-weight:600}

.user-points.dev
{background-color:#08c;
color:#fff}

.user-points.retired-dev
{border:solid 1px #555;
background-color:#202020;
color:#eee}

.user-points.mod
{background-color:#d2322d;
color:#fff}

.user-points.curator
{background:#86d34b;
background-color:#86d34b;
border-radius:.25em;
border:none;
color:#fff}

White ranks are NOOB RANK.
Personally I lost it.

Okay, fine, not that funny, but I think it's funny.
We finally have a definitive name!
It's not mean to call them noobs, because that's what they're classified as.

Literally. Their class is noob.