In general there is something wrong either with this probiller thing or nutaku themselves.

I tried last week to buy some gold, and no matter which option of payment I chose it redirected me to paypal (apparently because I used paypal to buy gold in the past), but it also demanded me to submit credit card data to paypal. HOWEVER the card HAD to be mastercard only, which is weird because paypal accepts visa as well.

Since I don't have mastercard I wrote the ticket to nutaku support explaining the situation, and you know what they said?

Of course it's possible to use different ways of payment. I only have to give them all details of the transaction, including my credit card number so they can do it for me.
So as you can imagine, I will not be buying any gold on nutaku, bacause fuck them.