Since there was a question posted to me by the Donut Master.... its all about price. When the real ones that have an actual published spec sheet and meet UL Approval cost $50 and the cheap Chinese knock off costs $10 with both parts and shipping to USA what do you think?
If your completion opened a donut shop across the street from you and used flour shipped in from China would you question how good or how safe his donuts were if he was selling them for 25 Cents compared to your $1.50 ones?

Interesting as to how many Chinese companies are into making connectors. Yes there are some good ones as I have used many, but you can't buy on price alone.
Search Result:
https://www.connectorsupplier.com/th...manufacturers/