What purpose does a <script> tag serve inside of a <noscript> tag?

I did some searching through their code and found this snippet (I've cleaned it up to make it more readable):

var DepLoader = (function () {  function init() {    var dependencies = document.getElementById("inline-deps");    if (!dependencies || JS.hasClass(document.body, "deps--loaded")) {      webfontsReady();    } else {      var html = dependencies.innerText || dependencies.textContent;      JS.addClass(document.body, "deps--loaded");      processRaw(html);    }  }  function isListed(a, b) {    for (var i = 0; i < b.length; i++) {      if (a.indexOf(b[i]) !== -1) {        return true;      }    }    return false;  }  function webfontsReady() {    JS.fireCustom("webfontsReady");  }  function processRaw(html) {    var el = document.createElement("div");    el.innerHTML = html;    var scripts = el.querySelectorAll("script");    var styles = el.querySelectorAll("link");    var common, signup, dialog, systemPage, commerce;    var others = [];    var inline = [];    var styleWhiteList = ["site.css", "dialog-", "signup-", "logomark"];    var scriptBlackList = ["management-", "ckeditor-"];    for (var i = 0; i < styles.length; i++) {      var style = styles[i];      if (style.href.indexOf("fonts.css") !== -1) load(style, webfontsReady);      if (isListed(style.href, styleWhiteList)) load(style);    }    for (var i = 0; i < scripts.length; i++) {      var script = scripts[i];      var src = script.src;      if (!src && script.getAttribute("data-sqs-type") !== "dynamic-assets-loader" && script.innerHTML.indexOf("SQUARESPACE_ROLLUPS") === -1) {        eval(script.innerHTML);      }    }    if (window.SQUARESPACE_ROLLUPS) {      for (var key in SQUARESPACE_ROLLUPS) {        var rollup = SQUARESPACE_ROLLUPS[key];        var js = rollup.js;        var css = rollup.css;        if (key.indexOf("common") !== -1) {          common = js;        } else if (key.indexOf("commerce") !== -1) {          commerce = js;        } else if (key.indexOf("signup") !== -1) {          signup = js;        } else if (key.indexOf("dialog") !== -1) {          dialog = js;        } else if (key.indexOf("system-page") !== -1) {          systemPage = js;        } else if (key) {          others = others.concat(js);        } else {          inline = inline.concat(js);        }      }    }    for (var i = 0; i < scripts.length; s++) {      var script = scripts[i];      var src = script.src;      if (!isListed(src, scriptBlackList)) {        if (src.indexOf("common-") !== -1) {          common = script;        } else if (src.indexOf("commerce-") !== -1) {          commerce = script;        } else if (src.indexOf("signup-") !== -1) {          signup = script;        } else if (src.indexOf("dialog-") !== -1) {          dialog = script;        } else if (src.indexOf("system-page-") !== -1) {          systemPage = script;        } else if (src) {          others.push(script);        } else {          inline.push(script);        }      }    }    function loadOthers() {      for (var i = 0; i < inline.length; i++) {        if (inline[i].getAttribute("data-sqs-type") !== "dynamic-assets-loader") {          load(inline[a]);        }      }      for (var i = 0; i < others.length; i++) {          load(others[i]);      }      JS.fireCustom("dependenciesLoaded");    }    var loadSystemPage = load.bind(this, systemPage, loadOthers, "system page");    var loadSignup = load.bind(this, signup, loadSystemPage, "signup");    var loadCommerce = load.bind(this, commerce, loadSignup, "commerce");    var loadDialog = load.bind(this, dialog, loadCommerce, "dialog");    var loadCommon = load.bind(this, common, loadDialog, "common");    loadCommon();  }  function load(tag, callback, label) {    var head = document.head;    if (Array.isArray(tag)) tag = { nodeName: "SCRIPT", src: tag[0] };    if (!tag) {      if (callback) callback();      return;    }    if (tag && (tag.src || tag.href)) {      var child;      if ("SCRIPT" === tag.nodeName) {        child = document.createElement("script");        child.src = tag.src;        if (child.src.indexOf("combo") !== -1) {          callback = function () {            Y.Squarespace.FrontSite.Core.domReady(true)          };        }      } else {        if ("LINK" === tag.nodeName && "stylesheet" === tag.rel) {          child = document.createElement("link");          child.href = tag.href;          child.rel = "stylesheet";          child.tyle = "text/css";        }        if (child) {          child.onload = callback;          head.appendChild(child);        }      }    } else {      try {        eval(tag.innerHTML);      } catch (e) {}    }  }  return { init: init, webfontsReady: webfontsReady };})();

As you can see, the <noscript> tag has the ID #inline-deps, which is referenced in the code (line 3) to load dependencies asynchronously and on-demand.

They probably use a <noscript> element as it allows them to directly access DOM elements, instead of having to place it in a string or a comment (which I consider particularly bad, as comments are not meant for actual information) and then parse it. It also prevents the execution of scripts and CSS styles until specifically loaded.

I personally find this an abuse of the <noscript> tag. I'm not even sure if it's valid HTML5 code. Using other methods such as declaring dependencies in a JavaScript object with a script loader should be used where practicable.