EDIT: SHORT VERSION - From a user's point of view what's better: One big site (Wikipedia) or multiple smaller sites (Spanishpedia and Techpedia)
I'm starting a site where people work together to collaborate on creating articles. The way people work together is sort of like a wiki, but not exactly.
The site will have many different unrelated categories, eg: sports, technology, Spanish, etc. Each category will have many different subcategories.
What do you think is better:
Having one large site, www.example.com that has all of the content separated into categories, which would be further separated into subcategories.
Having subsites like sports.example.com and tech.example.com and each subsite is dedicated solely to that category. Each subsite would really be it's own site dedicated to the category, and pitch itself as a site where people can go to collaborate on articles about the specific category.
I'm thinking option 2 has the benefit that users interested in a topic will feel like they have a site dedicated to their interest, and it will create communities around people with common interests.
However option 1 has the benefit that users are more likely to see another category they are interested in and then possibly participate in articles on that topic too.
What do you guys think is better?