X-link to the DRM-free thread for some bundles with sfnal interest items in them since IIRC we have some MST3K fans on MR:
Humble Mobile Bundle RiffTrax contains their popular Mystery Science Theater 3000-like satirical commentary on various movies ranging from the popular to the obscure. These are DRM-free to download, but need to be redeemed via keys for the RiffTrax website. Some of them are audio-only tracks you need to sync with video of your own, others are presented as video versions.
There's a freebie short available in exchange for signing up for the newsletter. There's a lot of sf/fantasy commentaries in there, including two Star Wars films, the 1st Harry Potter & Lord of the Rings & Jurassic Park installments, a Game of Thrones episode (all audio-only), and video for a Batman serial episode, Night of the Living Dead, and a couple more.
StoryBundle also has a humour books bundle with a Doctor Who teen idol magazine parody at the top-tier, and Bundle of Holding is offering some Lovecraftian RPG gamebooks.