DC Trinity sale at Amazon/Comixology. It looks like almost everything is 80% off or more so not too bad of a deal. It's not humble bundle prices but it's generally the best that you will find for DC comics.

https://www.amazon.com/kindle-dbs/comics-store/sales/?ref_=sv_kstore_cmx_2&_encoding=UTF8&slot=desktop-btf-5&scrollState=eyJ0b3RhbFBhZ2VzIjoyMCwicGFnZUluVmlld1BvcnQiOjF9

There's a Cyber Monday up to 50% sale on digital books on the Dark horse digital website - seems most books are 50% off.

https://digital.darkhorse.com/

And there's a 40% off digital books in the Vault comics website using code: CYBERMONDAY:

https://vaultcomics.com/

Dark Horse Digital is 50% off everything for Cyber Monday, but then add code THANKS for another 50% off, so 75% off total.

A whole lot of Hellboy in the new Humble bundle:

https://www.humblebundle.com/books/mike-mignolas-hellboy-dark-horse-books

The description reads 'PDF, ePUB, and CBZ', but it seems to be Pdf only

All the comics are PDF.

Among the comics there are three short stories collections and a novel, which make more sense as ePUBs:
- Odd Jobs
- Oddest Jobs
- An Assortment of Horrors
- Emerald Hell

And the Ghost/Hellboy special is available in PDF and ePUB.

A new 'Manga masters' bundle on Fanatical:

https://www.fanatical.com/en/bundle/manga-masters-bundle-2

A new Square Enix manga bundle on Humble:

https://www.humblebundle.com/books/square-enix-manga-collection-books

They don't specify what file format, which seems rather suspicious.

It's in the description.
"The titles in this bundle are available through Kobo.com. To access the content, create or log in to your Kobo.com account."

Yeah, missed that. so basically it means DRM-ed content. I miss the days Humble bundle would work only with DRM-free content suppliers.

For the fellow users pedantic about DRM and that worry about forgetting about this bundle and accidentally "buying" it (can't buy what you can't own, so more like "renting under the impression of buying"), custom filter suggestions for Ublock Origin: First will block mentions of the bundle in https://www.humblebundle.com/books. Second will block most of the bundle's individual page. And remove the spaces from the links in the filters since GOG still has issue parsing code formatting.

It should alo be noted that removing DRM from Kobo is not THAT difficult. If you add it to your Kobo account you can download a file to open in Adobe Digital Editions which you can then convert to a DRM-ed ebook. Then using the De-DRM plugin for Calibre you can fully remove the DRM in Calibre. It's a little cumbersome to do the first time, but after that it's a pretty quick process and I've bought quite a few comics on Kobo and haven't had any issue getting DRM-free versions of everything eventually.

Vault comics with a mighty kind offer to newsletter subscribers:

"As a thank you from all of us, get a free digital comic on vaultcomics.com.

Use code:
CHEERS
Promotion code good until 1/30/2024"

I know lots of people are down on Comixology these days but the New Year's DC and Marvel sales are going on now. Many Marvel Omnibus and Masterworks on sale for $4.99 each and lots of DC collected editions for up to 90% off.

It's not the best Marvel sale ever (I remember paying $1.99 for Masterwoks a few years ago) and I don't usually buy because I subscirbe to Marvel Unlimited but to me it's still a pretty good deal.

https://www.amazon.com/kindle-dbs/comics-store/sales/?_encoding=UTF8&ref_=sv_kstore_cmx_2

^ Worth noting Amazon is very pro-DRM, so pay at your own risk.

Once you've downloaded your e-(comic-)books, DRM should be of no concern anymore.
I'm pretty sure, I can read my (downloaded/installed) e-books, even if there's no online connection available.