Is it actually random or is it after you've caught up? For instance mine will show friends stuff until this message, then it starts showing me the random trash

Is it actually random or is it after you've caught up? For instance mine will show friends stuff until this message, then it starts showing me the random trash. I'm guessing they're going for engagement (random content > already seen content) but it's always my cue to close the tab, quite handy https://img.imgy.org/12nq.jpg https://img.imgy.org/12nq.jpg