I got one of those same cards. I also wanted to put some of it on paypal so I could buy another used car from another actual person. I couldn't get it to work either. I also tried buying something from another online store. I doubt this card has any use online.
I just used the card at my local hobby shop the other day, and it worked fine. Maybe people should start going to their lhs and pay no shipping fees along with no shipping wait. Most of the time if it isn't in stock, they can get it in stock in a few days. I know some people have a long drive and stuff, and that is a legit excuse, but really... some people are just lazy.
NOW if I can connect the two. My lhs is a locally owned place and the guy has an online store that accepts paypal. If I can go there tomorrow and see if he can put some money from the card online I bet he can do it for me.