One of the things I liked about when I was using it was that sources that posted more didn’t get more room in The Feed than sources that posted less. For various reasons, I’m using Miniflux now, and I wanted to replicate that. Here is a Tampermonkey script that will take your unread page and reorder the entries on it. It’s not particularly fast because I am not a Web Professional so be warned if you have your page length set to something long.

// ==UserScript==
// @name         Round Robin Sort
// @namespace
// @version      0.1
// @description  take Miniflux entries and interleave them by source
// @author       maya
// @homepage
// @match        https://<YOUR MINIFLUX INSTANCE GOES HERE>/news/unread
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    function getSource(x) {
        return x.querySelector(".item-meta-info li:nth-child(1)").innerText;
    var list = document.querySelector(".items");
    var items = Array.from(list.children);
    var counts = new Map();
    var priorities = new Map();
        var source = getSource(x);
        if (! counts.has(source)) {counts.set(source, 0);}
        var newCount = counts.get(source) + 1;
        counts.set(source, newCount);
        priorities.set(x, newCount);
    function cmp(a, b){
        return priorities.get(a) - priorities.get(b);
    list.innerHTML = null;
    items.forEach( x => list.appendChild(x));