Someone in another thread managed to exchange for dollars
They received an exchange rate of $1.65 for 1 bitcoin.
https://bitcointalksearch.org/topic/okpay-accepting-bitcoin-as-a-deposit-method-51403
also, it looks like once you have a balance > $15 you can order the debit Mastercard through the mail. You can reload the balance anytime and shop with it anywhere Mastercard is accepted.
So yes, I suppose now you can spend your bitcoins anywhere Mastercard is accepted. But it's much more expensive for you, and the normal debit fees apply for the merchants. But, if you have alot of bitcoins and you want to cash them out quickly, sure put them onto a debit Mastercard and go shopping!
Interestingly anyone with $1000 can set themselves up on their site as a currency exchange.
https://www.okpay.com/en/support/faq.html
It may be a way for anyone to easily buy and sell bitcoins.