I don't know. Most of them are images pasted into (and hosted on) Discord. Those links usually go belly-up even for me (on this site) after a couple of days, even though the images are still live in the Discord pages where I found them ... though if I was simultaneously logged in here and in Discord, then they show up here. This behavior only started (for me) in the last month or so, so I suspect something about link cacheing was rammed down my machine's throat (and I don't know if it's updates to Windows, Discord, Firefox browser, or even Dell firmware).