They do not.
I googled and it seems kicstarter projects set their region and depending on which region they choose some cards from other regions can have problems.
I think this is the case for me as well.
I have a pre-paid mastercard and the charge from kickstarter gets rejected.
I called the bank and they said everything is OK on my end.
People from other countries need Pimax to allow some other payment option, maybe from backer kit or something.