It is important to keep in mind that you built the franchise up to the certain point before you introduced commercial content.  Whether you are going to promote yourself or another firm, readers have to feel strongly enough about the content not to mind, and even to embrace, the commercial messages.  You have to provide your readers quality content to a size-able audience, it may be worth your while to test advertising.

If you are successful in getting advertisers to underwrite your content , you have effectively gotten out from the under the costs of your own email public relations program.  In fact, it may very well turn out to be a profit center for you.