Never add funds
Please never add funds into the account, as you will not be able to completely deplete your funds. I have $47 credits in my account, I need to purchase exactly $47 after taxes, tips and fees to be able to use up these credits. If I spend $50, I am not allowed to first use these credits then use other forms to pay the remaining balance. Add more credits you ask? The lowest denomination is $50. It will be an infinite loop.