Yeah the debit card isn't as good as the OKPay one I would say.
$500 a day with no option to raise the limit I don't see. but that is a fair amount to be able to withdraw per day.
The other thing I don't like is the little fees for everything, they could add up pretty quick.
https://www.cashx.com/prepaidCards
Anyway just speculating here
OKPay still looks like the best option