Apparently both memory cards and memory card readers get dirty over time, as dust or liquids accumulate on the contacts, corroding the metal and affecting transfer speeds. Or so Evergreen wants you to believe. The reason? Their memory card reader pack.
The set consists of a cloth and various sized "fake" memory cards with material on the end designed to clean the contacts inside your reader. Useful if you've been having problems with your card reader, not very useful otherwise. Depending on how much these go for, it may be cheaper just to go buy another card reader.