I bought Future80s2 bundle on Groupees:
One could pre-order before the bundle was announced for $2 and there was some pictures posted with some other of their albums which I googled for and at-least some was around on YouTube so I listened to them and it sounded cool so I bought it (even though the music was on YouTube, but whatever, price was fair and it made me smile / got me something new to listen too.)
However I hadn't bought the old bundle because I don't check Groupees well enough but Future80s hooked me up with the old content too - everyone was a winner :)
If the stuff is DRM-free I feel safer and while I for instance have had Shadow warrior both DRM-free and Steam key I've added the Steam key to my account even though it could had been sold of and I could had played the DRM-free copy instead but ... Yeah. I paid for the game and that's kinda the reason to pay so .. Whatever (If I sold it off sure my DRM-free copy wouldn't had been "illegal" so I guess that would had been one minor difference but ...)
Humble Bundle ran a MAD bundle which used some Magztercrap which people complained about because they didn't got PDF files. I checked whatever it could be pirated and at-least much of it seemed to be so that meant that pirates got PDF and/or CBZ files whereas buyers got ... I don't know what they got.
Anyway I bought the bundle at $1 at first to see how it was and tried to add the code on their site but it didn't even let me to so .. Yeah. No MAD magazines for me and no further $14 for them but I kinda had already decided that.
If they had offered me PDF and CBZ like more or less every other comic book bundle on HB does I might had bought it since I buy close to all of them but .. Yeah.. I don't want to use a website to watch them or whatever.