A sign of WHAT? You still have not explained what the story actually is. When firing 10.000 people on relatively short notice, I would think it unfortunate, but completely expected, if some mistakes were made.
I have no idea. Why are you asking me? The article does not mention it.
EDIT: Or did you mean to say that the article’s story is that the firing was done too quickly? That is actually a decent point, and the article would have been much better if it actually made that point. As it is, the article talks around things, avoids giving crucial details, and relates unconnected facts and pretends to have presented some sort of point, when in fact it only presented the illusion of one.
The fact that they turned around and tried to rehire them before even 24 hours had passed should probably be a sign.