every time i try to buy something on a seperate site with one of my prepaid cards, it either says "Your credit card isn't valid. Please try again, using another funding source." when the card clearly works and is activated because i can buy stuff on other sites and places. Or it tells me that i have to link my bank account and try again.
and it hasnt just been me with this problem, there are many other people that have/had this problem.
