even the tab on my web browser reads CZ-USA for this website? Why doesn't someone shut them down if it's known to be fraudulent?
Who might that "someone" be.
Tabs and whatever name they may happen to exhibit mean absolutely zilch.
Please, I implore you, I implore everyone, pretty please with sugar on top:
Be advised the internet in general is a target-rich environment for scam artists all over the globe. The operator of the website in question almost certainly lies beyond the reach of any law enforcement agency anywhere. The money they collect in untraceable bitcoin or whatever is almost certainly used to finance international terrorism, illegal drugs, human trafficking, no end of other horribles etcetera ad infinitum. Where else do you think they get the money from if not a nearly infinite worldwide supply of gullible individuals, and the US is by far the richest source of them.
Realizing that it's easy for me to say, if one were to inspect the website you will find absolutely no indication whatsoever as to any relationship with CZ-USA. Worse, no physical address or even a phone number where a human being might actually reside. As such it should be regarded as untrustworthy on its face. Forget about buyer beware. Start with browser beware.
Again, it's easy for me to say, but people get scammed like this all the time. Personally I place blame squarely on one extremely popular search engine that I refuse to name but is often characterized as being "your friend." It is NOT your friend.