On the first humble bundle, the speculation was that Linux users are happy to pay a little extra for something they normally do not have access to. Game developers often do not target Linux, so a bundle of indie games with explicit Linux support was fairly novel. Many who commented said they wanted to show the market potential for Linux support, and by keeping the platform average higher than other, more supported platforms, they would achieve this goal.
I don't have any hard evidence on the success of that, nor do I necessarily feel it is relevant to expand this out to an ebook or music bundle, but the information is there as presented.
I don't have any hard evidence on the success of that, nor do I necessarily feel it is relevant to expand this out to an ebook or music bundle, but the information is there as presented.