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You should ask yourself 3 questions about the content you plan on publishing. Is it a "resource" to someone, if optimized to specific keywords, does the content match the intent of the search query? Is the content to similar to other content on your current domain? Is the content shallow - how many words, did you enhance it with "extras" like pictures/media, how in depth does the content dive into the subject? If you are finding that you're publishing more than you feel comfortable doing on a single site, I don't see the harm in offering some of those articles to other blogs or websites. Just make sure you ask the 3 questions above before trying to place your content on other people's websites because you want to  make sure any relationships you build through this method are solid.