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Blogs category is for all blogs. They can be on domains, subdomains and free blog hosts like Wordpress, but it have to be a Warhammer blog
Commercial sites category is for all sites selling Warhammer merchandise like books, figures, gadgets, warhammer gold etc. Generally sites which takes money from selling various stuff related to world of Warhammer.
Fansites, guildsites and forums is for all other non-commercial websites like communities, databases and useful Warhammer info.

That's how should look perfect submission:

Warhammer Online News
It’s probably most popular Warhammer Online blog on the internet. Author is working on his blog from May of 2007. Warhammer videos, screenshots, articles and production news + many more right after premiere all you can check on my blog. I will be very happy and satisfied when you check my blog. Warhammer Online News.