The bundle was extended a week.

Marvel Monday is called Secret Wars: Battleworld and has an assortment of 'big events' at $.99 per issue.
https://www.comixology.com/Secret-Wars-Battleworld-Sale/page/6835
1602 1-8
Spider-Man: One More Day four issues
Iron Man (Armor Wars) 225-232
X-tinction Agenda nine issues
Hulk: Future Imperfect 1-2
Uncanny X-Men (Days of a Future Past) 141-142

We're now up to 45 free previews of the post-Convergence DC.
https://www.comixology.com/search/items?search=Sneak&subType=Extras

To reach the last bonus the Groupees Dynamite bundle has to be bought 1400 times in the next 20 hours! *lol*

Edit: Groupees is really funny: One more day of sale has been added to the bundle - as if that would highten the chance to reach that utopian last bonus ...
Edit2: They reduced the goal from 2500 to 1500 bundles but that will still not be reached (without a miracle or more extensions).

Big Dynamite Pulp sale ends 6/4/15. Many (most/all?) of these are in some of the 57 different Dynamite bundles we've had all over the place recently.
13 different collection priced from $2.99 to $14.99
22 singles at $.99 each
https://www.comixology.com/Dynamite-Pulp-Heroes-Sale/page/6843

The weekly DC sale ends 6/8/15, bills itself as a The New DC Universe Sale Week 1, and has a ton of new 52 books.
Batman 1-38
Harley Quinn 1-14
Justice League 1-38
Action 1-38
Aquaman 1-38
Batgirl 1-34
Batman/Superman 1-18
Catwoman 1-38
Deathstroke 1-20, 1-4
Detective 1-38
The Flash 1-38
Green Arrow 1-38
Green Lantern 1-38
Sinestro 1-9
Suicide Squad 1-30
New Suicide Squad 1-6
Superman 1-37
Superman/Wonder Woman 1-15
Teen Titans 1-30, 1-6
Wonder Woman 1-38
Secret Six 1
Lobo 1-4
Gotham by Midnight 1-3
https://www.comixology.com/DC-Universe-Sale/page/6844

Another Marvel collection on sale, unknown duration, the 420 page Avengers Absolute Vision Book One for $3.99, collecting 16 mostly Avengers books.
https://www.comixology.com/Avengers-Absolute-Vision-Book-One/digital-comic/159914

A couple new foreign language book sales at Comixology.
https://www.comixology.com/comics-sale

A new freebie at Dark Horse, remember to load/read it to add it to your library.
https://digital.darkhorse.com/profile/5883.stan-sakai-builds-characters-sampler/

We're up to 14 of the 2015 FCBD books at Comixology now.
https://www.comixology.com/search/items?search=Fcbd&subType=newreleases

New DCU freebie.
https://www.comixology.com/The-New-DC-Universe-DC-YOU-2015-Sampler/digital-comic/241974

The Submit sale of the week is 50% off Testament with code MYTH. I sampled the series in the past and liked it enough to buy the omnibus last time it was on sale.
https://www.comixology.com/Get-50-Off-Testament-Use-Code-MYTH/list/6983

From Boom, ending 6/4/15, a bundle only sale on Suicide Risk, 57% off at $22.99 for the complete series of 25 issues. If you bought the Boom Humble Bundle you already own volumes 1 and 2 of this series, collecting the first 8 issues.
https://www.comixology.com/Suicide-Risk/bundle/938

Today only, Hogan's Alley Magazine is having a $5 (free shipping) sale on select back issues. A lot of Silver and Golden Age material in these books, not to mention all the comic strip and animation history, too.
www.cartoonician.com/purchase-hogans-alley/

Spring cleaning sale at Bud Plant. Lots of classic stuff.
http://budsartbooks.com/search.cfm/kw/junsale

Dark Horse weekend sale should be up soon.
https://digital.darkhorse.com

Another sale from Image on the quite good series Lazarus, ends 6/7/15. 15 singles at $.99 each and 4 collections at various prices.
https://www.comixology.com/Lazarus-Sale/page/6917

Marvel sale today only, called Battleworld Secret Wars again, but just some older singles.
Thor: God of Thunder 1-25
Deadpool: The Gauntlet 1-13
https://www.comixology.com/Secret-Wars-Battleworld-Sale/page/6920

Apocalypse sale on Dark Horse

The Last of Us, The Massive, Orchid, Terminator, Killjoys and The Umbrella Academy

Today only, another Marvel Secret Wars Battleworld sale.
Captain Marvel (2012-2013) 1-17
Marvel Zombies (2005-2006) 1-5
Squadron Supreme (1985-1986) 1-12
All-New Ghost Rider (2014+) 1-6
https://www.comixology.com/Secret-Wars-Battleworld-Sale/page/6921

Ending 6/14/15, a Marvel Ultimate Line Collection sale, 20 books at up to 80% off.
https://www.comixology.com/Ultimate-Collection-Sale/page/6940

From Avatar, ending 6/22/15, a bundle only sale on Warren Ellis Heroic line, 21 books for $24.99, only 37% off.
https://www.comixology.com/Warren-Ellis-Heroic-Bundle/page/1975

From Humanoids, ending today, the three volumes of Jodorowsky's Megalex on sale for $1.99 each.
https://www.comixology.com/Megalex-Sale/page/6919

Also ending today, the Submit Crime sale, 50% off a bunch of cool crime books with code CRIME.
https://www.comixology.com/Submit-Crime-Sale/page/6918

Week 2 of DC's huge sale is on, ending 6/15/15. Remember that DC books are available in the separate DC app where one could buy discounted iTunes cards for some savings versus Comixology proper.
It includes 345 books from the 1980s to 2015 at up to 75% savings.
https://www.comixology.com/DC-Universe-Week-2-Sale/page/6957

Comixology has another weeklong sale, this one from IDW on G.I. Joe books; 2 collections and 20 singles at 50% off.
https://www.comixology.com/G-I-Joe-Sale/page/6967

Over at Comixology, 4 more temporarily free comics up:

https://www.comixology.com/Spider-Man-1990-1998-1/digital-comic/11609
https://www.comixology.com/Silver-Surfer-Requiem-1-of-4/digital-comic/7576
https://www.comixology.com/Nextwave-Agents-of-HATE-1/digital-comic/6765
https://www.comixology.com/Scarlet-Spider-1/digital-comic/18938

From Titan, Death Sentence sale, 6 floppies at $.99 each and the collection with 26 pages of exclusive commentary for $6.99, ends 6/14/15. Looks like solid reviews; anyone here ever read this?
https://www.comixology.com/Death-Sentence-Sale/page/6958

Humble Jim Henson Comics Bundle

One week only

PWYW for

- Jim Henson's The Dark Crystal: The Novelization
- Jim Henson's The Dark Crystal: Creation Myths Vol. 1 & 2
- Fraggle Rock Classics Vol. 1 & 2
- Fraggle Rock Vol. 1 & 2
- Fraggle Rock: Journey To The Everspring #1-4

BTA for

- Jim Henson's The Musical Monsters of Turkey Hollow
- Jim Henson's The Storyteller Vol. 1
- Jim Henson's The Storyteller: Witches #1-4
- Jim Henson's The Storyteller: The Novelization
- Jim Henson's Labyrinth: The Novelization

BTA + $2 for

- Jim Henson's Tale of Sand

CBZ, PDF, MOBI, and ePub available

The awesome submit book Anne Bonnie #1 is free with code ANNEPOD.
https://www.comixology.com/Anne-Bonnie-1/digital-comic/83574

Another FCBD book has appeared.
https://www.comixology.com/FCBD-2015-Hip-Hop-Family-Tree-3-in-1/digital-comic/227686