Why do i have to pay every time i use my prepaid card

This is how the prepaid card companies are able to provide this service to you.

there are now price plans to help you limit how much it will cost you such as

Pay as you go Card  - If you are only going to use every now and then

Pay Weekly tariff - Tuxedo Prepaid Card prepaid card now offer a option to pay weekly and limit your charges - most of them now become free

Pay Monthly Prepaid Cards monthly - If you are going to use your pre paid card on a regular basis then this may be the cheapest option for you,

Best bet is to work out how many times you are going to use your prepaid card first, ask yourself
How many transactions will i do a month?
How many times am i going to use the atm?
How many times am i going to reload my card?

Once you have answered these questions you can then work out which prepaid card is best suited for you and not based on how it looks, as they all have the same function.