There was no reason to leave, we don't bite around here (unless you're into it...)
They actually correctly linked the image the first time around: inspecting the suspicious empty line in the original comment revealed an img-tag, i.e. a note telling the browser "please look up this image and place it here".
The issue here is that the image wouldn't load for either of two reasons: 1) the website won't give it out, or 2) the browser wouldn't even try to fetch it. The former is what happens with Discord images, for example - the server detects you're not visiting the way you're supposed to and refuses to give you the image (this is still the nicer thing they could do). The other one is a security measure by the browser to prevent malicious things to load. In my case, Firefox (and its forks) are configured by default to block unsafe domains, with pbs.twimg.com having lapsed into insecure status due to gross mismanagement.