I swear it moved!

So I came across an interesting use of animated gifs. I was looking at the comic strip - "For Better or Worse" - and I saw some movement out of the corner of my eye. Attributing it to lack of sleep, or sheer craziness, I ignored it, until I saw more movement from a different area. Watching the strip intently I saw the various characters blink. It's an interesting thing that they've done, I'm not really sure on the benefit, although I suppose it does make the characters seem more human? Take a look and see what you think.