> Who had pig butchering in Cambodia? <
I recently read an article about this. Young folks from China and elsewhere are lured to Cambodia with false promises of work. Then they are housed in prison-like conditions, and are forced to run online scams.
Why Cambodia? Evidently the authorities there are easy to bribe. They take the cash, and then look the other way.
Wikipedia had a decent entry about this.
https://en.wikipedia.org/wiki/Scam_centers_in_Cambodia