How Content Platforms Rank Their Feeds: From Reddit's Formula to TikTok's Interest Graph
Take apart the feed ranking of ten platforms and they're all solving the same problem: how to trade off between newest, best, and letting new content be seen. What actually decides your answer isn't how clever the algorithm is, but whether your content is oversupplied or scarce — big platforms rank to filter content out, small communities want every post to be seen.