Here was my experience. My daughter left first. When we took her bag to get the masks counted, the guy looked up from his cell phone and slapped a sticker on her carry-on saying that she was checked without even looking. I asked him if he wanted to count (there was exactly 30 in her bag) and he said no, and went back to looking on his phone.

A week later I went. The woman actually opened my bag and rifled through everything and did a quick count. When my son went, she just asked him how many he had and put the sticker on his bag without actually counting them.

So it seems how much they care is pretty inconsistent. I get the sense that they just want to stop the Chinese resellers from trying to take hundreds of masks.