One of the benefits of Article Marketing/Writing is that you end up creating relative content for your website as well, which can offer your consumers more information, offer you the opportunity to link within your research to products within your store (generating sales), and also improve your search engine standings.
It also gives you an opportunity to send an email blast to your customers that has that relevant content inside it, where you can link back to your site within the article itself, and possibly offer a special.
All in all, it's a win/win situation - your customers get educated, your business benefits and it's an extra bonus that it's something that you enjoy writing and researching... What's that old saying? Do what you love, the money will follow!
Edited to add this link:
Article marketing - Wikipedia, the free encyclopedia