Unfortunately, our host had serious issues the moment the article trended on HackerNews... very bad timing! We've actually moved server quickly so it should soon be back to normal.
I agree - but my article isn't about what works or doesn't. It's about getting ideas to test. In fact, as I mentioned in the article, what works for one site definitely might not work for yours - so testing is always the answer. Having said that, I think that it's good to look at what the successful startups are doing to get ideas for testing.
Really sorry about that - we've now disabled this plugin. We were actually having some serious server issues which was making the wrong thing load. Won't be activating it again!