Marvel has a today only sale is on a bunch of Deadpool, 71 books from the 1997 series.
https://www.comixology.com/Deadpool-Sale/page/5585
The weekend Dark Horse sale isn't up yet, I think it pops up at around noon normally. So check this link in a few hours.
https://digital.darkhorse.com
Submit Sci-Fi sale until 3/1/15, use code SCIFI at checkout for 50% off, 48 different titles are included.
https://www.comixology.com/Submit-Sci-Fi-Sale/page/5584