One of the best ways to expand your blog (and your traffic) is by creating new blogs related to your current content. Why create a bunch of unrelated blog with no interlinking opportunities, when you could expand your current efforts with a string of blogs all interrelated?
I’ve noticed plenty of websites out there even creating multiple blogs with the exact same content? Yes I’m saying you can successful expand your efforts doing the exact same thing. Now keep in mind expanding with the exact same blog over and over necessarily won’t always work.
Why not focus on creating new blogs foceused on only one category for better seo?