The card was serviced by the evil Bank of America, and since the prepaid Visa disaster of about three years ago, I swore to never use them again.
The gist of that story was that I, as a newcomer to the States, did not have a credit history, and only could begin building it by getting a prepaid credit card. I did that, and after 6 months began receiving credit card offers. So I paid off my prepaid Visa and closed the account, and asked for my deposit back. It took Bank of America more than four months, and my complaint to the Better Business Bureau, to finally return my cash to me.
Needless to say, they do not offer any interest on deposits.