Blogs are an easy way of bringing visitors and getting into online community faster than a normal website. That is because search engines love blogs and index them quickly. You can see results quickly as well. This is something that every blogger understand. However, the question is that the search engines can easily forget blogs if you do not update it regularly.
Search engines love the blogs that update regularly. So do the readers.
If you have not update, the blog for sometimes you will see a decrease of number of hits you get. On the other hand if your blog is using pay per click services like AdSense then you might see that you will get high payouts per click. That is a different story. Remember to keep posting.
