I'm pretty sure all of those companies also take $'s for digital goods. Microsoft is the most famous for having a credit system, but you can still buy retail do

I'm pretty sure all of those companies also take $'s for digital goods. Microsoft is the most famous for having a credit system, but you can still buy retail download games using $'s. AFAIK, the only reason these companies would use a credit system is so that people need to buy credits in bulk, reducing the hit received from processing credit card transactions.