It is less about link baiting than about having a bit of fun. If you notice both blog posts were made before this thread. Yes, it will drive 1 or 2 extra visitors to the blog, but I receive almost 200 people a day anyway, I do not need to try so hard for 1 or 2 extra. I do it because I like it.
I dont see a problem with their commercials. It reminds me of the early Yahoo commercials but in a more obscure way to make you visit their site. It worked for Yahoo so it might work for Bing even though it could have been clearer in its message.
I thought they could have explained a little better what Bing actually is, for most of the world who have no idea