(Of course, if you're not in the US, they've already made the choice for you. Thanks terrible international intellectual property laws!)
Until today, my experience buying #ebooks from Humble Bundle was they were always available unencumbered by #DRM. I have hundreds of #DRMFree#epubs built up over the past decade.
The #PratchettDiscworldHumbleBundle is through #Rakuten#Kobo's ebook shop, and all the books are encumbered by #Adobe and the #AdobeDigitalEdition DRM. There is zero indication that this DRM is included on the bundle page itself. and it explicitly says "Use on Any Device". On the #RakutenKobo page itself, the only indication the file has DRM is some small bottom-text that says "Download Options: EPUB 3 (Adobe DRM)".
Also, DRM Digital Editions will also "helpfully" install Norton for you as well. It's like the dogshit you just stepped in offered to stab you in the kidney, too.
This is shameful and disgusting from Humble Bundle. I know Humble Bundle got acquired years ago by IGN/Ziff Davis, but they'd avoided the levels of #enshittification to make me stop using them.