I also use a pre-paid MASTER card for my shoppings on net.So far only your system refused me. And i have 3 paid accounts that i pay monthly.But since bibit refuses my card, i have to use Bank transfer option, which costs me 14 euros for a month per account... (paybycash is only 8 euros)..And when my monthly subscription ends , i have to wait like 5-10 days to be reopened.....(Just letting u know to not be so suprised when ppl leaves the game lol, its suprising to not have options like paypal and such..)