I confirmed the following with their team:

Yes they work very well in the US. Any where they see the Discover Sign they can use the CUP Ruby card

Thanks for taking the time to look into this for all of us.

Just to further clarify, CUP = China Union Pay?

I searched and just found this, which seems to indicate the fee structure:
[from there: Physical Card Order (including DHL/FedEx Delivery)$ 49.00 ]

But it doesn't define what CUP is. All I see is
"This Paycent card [ruby] is powered by CUP that comes with a daily spending limit of US $5,000 and with a withdrawal limit of US $5,000."

This site seems to indicate that CUP is China Union Pay:

My first reaction is that I'd rather not use a Chinese bank but everyone can do their own research and make their own decisions.

Yeah CUP is China Union Pay, UPI is Union Pay International both work the same. My advice is use the card simply as a payment vehicle of convenience, just load what you intend to use in the short term. That goes without saying for any crypto debit card.

Thanks very much for your helpful reply!

Excellent. Thank you for the confirmation on this. I will look in to getting a card in this case.

Yes dear off course US is hub of the world then why not paycent work there.

Doesn't mean that it does

I will ask their team and confirm.

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