Fesin: And if I remember correctly, you thought it would be the highest-grossing Humble Bundle ever, so you should at least be a little surprised.
Highest
selling.
Considering the circumstances, this was a very position for the bundle.
All of the games have been heavily discounted
several times before. Also, apart from Saints Row the third, those were all rather old games.
This effectively means that this bundle was mostly interesting for people who either wanted Steam keys of games they already had (like me) or people who weren't interested in those games before. Both groups won't be willing to give much. Even I only paid 10$, which is the lowest I ever paid for any humble bundle.
Comparing this to the HIB V is just silly. The HIB 5 were 8 different highly liked developers. And even then it only scored a 3$ higher average. Bundles by single companies always have a low average (Humble Introversion Bundle had $ 4, the Frozenbyte had $5. Even the Mojam bundle (also highly regarded dev) only had as much as THQ. Now let's take a look at the highest average bundle. Which was the book bundle. Roughly 15$ average on this one. What is the difference? Books were all written by a single author. A high personalisation which, like with the indie developers, leads to people willing to give more. And this considering that ebooks are usually cheaper than games, which means it wasn't the higher "perceived value".
If DRM was a factor, it was a negligent one. Because people bought the game, but not paid much. If the DRM would bother people, they wouldn't buy the bundle.