Only big games company I've seen doing a sale for Easter is EA. What's happened to the likes of Gameloft, Namco, Sega, etc?
Looks like Alawar has put their whole catalogue up for sale http://forums.toucharcade.com/showthread.php?t=129149
Publishers and developers wising up to the idea that having tons of sales is not a good marketing strategy for the long term, that's my guess.