You expect anyone being able to answer that?
The company which produces LimeWire can't control or monitor what is being downloaded, and I hope you don't expect Users to answer you.
Gnutella is a decentral Network. Inform yourself at
http://gnufu.net about its workings, and you'll be able to find answers to questions. You won't get answers to questions about the shared friles from there, as you won't get answers about teh number of movies downloaded from FTPs via the internet in a forum.
And besides: Your info is not quite correct. iTunes just hit the 100 millonth download.