Their wordpress plan is super expensive. They have you pay per visitor, I recall looking into it some time ago for my personal blog and it was beyond $100 per month to support enough visitors for the HN front page.
Yeah, that's mostly because wordpress is a dog. It really uses a lot of resources to serve the smallest of content. We use a CDN, a caching layer, and object caching in both wordpress and php, to make our site perform even half-way decently.
It's mostly static and cached content. Wordpress.com can serve orders of magnitude more traffic for free. Dreampress price is definitely not justified by the costs of resources.
