I have been looking for multiple C8 out AC cords for a long time. I frequent all the SE Asia computer/tech malls.

This is a great find, however, I will still use my DIY single AC to 4 X C8.
I made one for US/Canada two blade, UK/HK/SG three blade and one for China angled blades. each C8 out of the "junction box" is about 1 metre making it usable that it can plug into the USB charger and power bricks.
It is not as compact but still takes up less space than 4 C8 - AC cords.

The adapter while compact will have a problem plugging it into more than one or two devices.

BTW It is half that price on Taobao. That seller is also out of SH?