This has been a widespread phenomenon in the US since forever in the private shipper space. "Mark as gift" "value is $5".

The issue of course is that it's fraudulent. It remains to be seen how closely the US is going to be enforcing it. I have a feeling Chinese shippers will be under the most scrutiny.

They can ship it from EU or Mexico or what have you. This type of warehouse and forwarding service is very widespread.