I've had odd purchases on my credit card exactly twice. The first, I didn't check to see where it originated, I didn't care, it wasn't my purchase. I contacted the bank, they reversed the charge, and I got a new card. The second was a "test me" charge of 85 cents. Having been instructed in the "art" of credit card fraud, this was a red flag for me immediately. I contacted the bank, told them someone charged something they purchased in Missouri for 85 cents, and it wasn't my charge and was definitely suspicious.
What they do, is they "ping" the number to see if it works. If it does, the next purchase they make will be significantly more. OR they'll sell the number to a criminal listing service that sells them further to people who actually buy stuff.
Immigrants have nothing, zilch, nada to do with this. It's mostly Americans who are the initial criminals. They steal the numbers and get paid to sell them to listing services. Those listing services will sell the numbers online, worldwide, to whoever is willing to pay for them.
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