One common email we have been getting is people notifying us that they see live Humble Bundle key links around the internet on various forums, 4chan, and even Steam! I decided to look into this a little bit and try to guess how big of a phenomenon it is.
After some simple math, I estimate that over 25% of Humble Indie Bundle downloads are 'pirated' -- that is, users download from shared links from forums and other places without actually contributing anything. Note: that is not including BitTorrent and other sources.
How do people pirate the bundle? When I say this bundle is DRM-free -- I really mean DRM-free. Not only do the games themselves have no copy protection (not even a simple serial number check), but the Humble Indie Bundle website has limited copy protection. That means there are no download limits, everything is reachable on the command-line with 'wget', you can resume downloads, and do anything else you would expect to be able to do with a personal download link.
25% seems incredible given that you can simply pay $0.01 to be completely legitimate. Is this figure correct? Let's take a look at some raw download data.
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