Maybe the site owner got hit by a bus... Or two... Or something.
But usually this is quite normal for a website. Most webmasters don't update their site every single day, they wait for some truly interesting and exciting news before they make a post on the front page. If they made headlines with "Hi everyone! Just wanted to say hi!" then the site wouldn't be nearly as productive, or professional for that matter.
However, ESF-World's update frequency is unusual, even to me. It's been 4 months since their last update, so I'm wondering what could be going on. I still check back every few days to see if maybe there's a new post on the front page with some news on models or the mod itself. But there never is. ESF-World is dying, and fast.