It's always a bad problem on niche chassis forums like this. Was the same way on G2IC. I usually post pictures directly from my computer, that way, unless the forum crashes, you won't see missing link errors. However, most people I believe use image hosting services, and those services either stop hosting the image due to lack of use, or their membership runs out, etc., etc.
The admins can't, and probably wouldn't go through someone else's thread and restore the pictures as it either wouldn't be feasible or ethical (or have the time).
You'd have to have whoever was the OP restructure or fix the thread, or upload the pictures again. However many of those guys are long gone, hence why the threads are filled with broken links.
That's just the way it is lol