An update.
I sent $24 worth of bitcoin (
transaction), as instructed by OP, in order to top up my balance on the card with $20. I have no way to verify if the deposit went through and if the user actually credited the account, but we will find out when a subscription renewal requires payment. I've asked the OP via SKype, and haven't received an answer whether the account has been topped up, even though we actually have had correspondence regarding other issues.
Additionally, this card does not work to pay for Spotify Premium; I've tried multiple times from different countries (using a VPN).
I'll update this thread again when there is additional activity regarding the VCC I received.