Simple question about Pre-Paid credit cards.

Hello there! Okay, so, I have a Pre-paid credit card. I know that I can come into a bank and tell them "PUT MONEY ON MY CREDIT CARD NOW!", but I wanted to ask, can I put money on it online? Can I sell stuff online (like Dota 2 beta, giftables) and then moneyz ( € ) would go to my credit card's bank account? I use Paypal to use it, by the way.

Thank you for reading!