A recent trend amongst scanlators recently is to put shit in .pdf form. Yep, instead of getting a .zip and looking at all the images, you can get the full chapter in all its glory as a .pdf. This is another method to limit distribution, but I've noticed it doesn't work that well because I still find jpegs in zip files on forums or posted all over online readers. To be honest I don't care about it that much because at least that means they've stopped this stupid password nonsense.