Personally I'm not a fan of fake anything, I don't see the point. I would rather Primark (Penneys here) than fake from a stall or dodgy website.
Make up though just seems utterly pointless, no? Fake Mac, brushes and now Kylie lip kits are popping up everywhere and people are going mad for them. It won't even have been tested, you don't know what you're getting and it's going on your skin!
There are numerous reputable cheap brands of make up, why would anyone resort to fake just for a pack that nobody will even see?