A $10 USB charger that steals MS keyboard strokes

https://news.ycombinator.com/item?id=8874620

Also, Microsoft's statement:

"In addition, users of our 2.4GHz wireless keyboard designs from July 2011 onwards are also protected"

If both are true, that gives an interesting insight into Best Buy's inventory management. I bet those keyboards have a lot of margin, but tying up your capital in a keyboard for over 3 years? They should be able to do better (at least, I would expect they do better for smartphones and the like)

Of course, this is one data point. Does anybody know whether this is normal in electronics stores for this kind of hardware?