how many times can a vcc be used ?

Was just wondering if i could use a vcc for the free facebook credit, and use it for free webhosting etc as well.

it's like toilette paper you can turn over several times lol . ... Damn ... witch vcc ? from where , what features have ... Did ya know some of banks allow's to create vcc set to auto close after first transaction , others can create vcc's with limited time usage , limited balance , credit check and so on .. ? An questions like this it's similar with '' will sun raise on the morning ? '' ?