Noticed that there are quite a number of "OEM" Sandisk Extreme CF cards on sale in Clubsnap.
Me and my friend happened to test one, acquired from someone in Clubsnap.
And they have all the FAKE signatures on them.
Can refer to this e-bay link on how to tell a fake from a real one.
Luckily in the end we didn't buy the fake cards; they're priced too cheap to be true.