"Fake" memory cards bad????

Whats the deal with these...I know they're "fake" but are they necessarily bad?...what i mean is will they still keep my game saves?...whats the deal with them does fake necessarily mean bad or non-functioning??

alright well that blows because i just bought a memory card off ebay...before i knew about this entire scam

...and i'm willing to bet anything its a fake

probably a fake

but i think it's not that bad, since a friend of mine has a fake one and he's never complained about anything. In fact he is always making fun of me since mine was prizier than his. Still I don't trust fake sticks, but the worst it can happen is that they have less space available or they will suddenly die (maybe, but he's been using it since 2006, lucky bastard)