MagikaUltima

Hi everyone, I'm wondering if it's possible to transfer my lindon dollars to USD on my account (WITHOUT withdrawing it) and then use that USD to pay for premium subscription, without having credit card or bank account information? I signed up using the basic account, and I was hoping that after I earn around 2000 lindon dollars or so, I could transfer that amount into USD via the LindeX and pay for subscription. Please let me know if this is possible. Thanks