I LOVE To sell stuff, but selling on our website LOWERS response (lesson learned the hard way). I can "sell" ideas and concepts on platforms like Scoop.it (http://www.scoop.it/u/martin-marty-smith), but not on platforms we own or operate.
On "owned' properties I prefer to curate great content said about us. We also create content to help prompt some key brand messages, but our jobs as Internet marketers is to curate what others say about us into our own platforms AND provide ways for UGC (User Generated Content).
Factual information about a company's creation story, services and process is fine, but don't spin it as greatest thing since sliced bread because anything like that is you talking to yourself about yourself :).