I don't know the exact situation obviously, but isn't it possible that the poster simply wasn't able (or didn't know how) to add the strikethrough, but had the expectation that anyone who knows about this form knows, and the replying commenters were indeed people who did instantly recognize that jumble of characters, and acknowledged it?

Like, I didn't know about that form of the loss meme, but now that I know it's loss if you add strikethrough, I'm pretty sure I'd recognize it even without the strikethrough.