The feed that is moving right now
Votes push a meme up, and the older a meme gets the less each of its votes weighs. So a fresh meme with a couple of upvotes overtakes yesterday's meme with a pile of them: the top of the feed keeps changing instead of freezing.
hot = (up − down + 1) ÷ (hours since posting + 2)1.5
Two upvotes and no downvotes in the first hour beat ten upvotes from yesterday. A meme with more downvotes than upvotes drops below everything with a positive score, and it only comes back up once the upvotes outnumber the downvotes again.
Time to get a new house hooman!