How about an "ask a question" feature.... presumably newsletters will be sent on a topic which the sender is interested in / an expert in and at least partially

How about an "ask a question" feature.... presumably newsletters will be sent on a topic which the sender is interested in / an expert in and at least partially with the aim of drumming up business.... so e.g. if I send a link about what to do or not do when applying for a job (subtle link - previously posted, I admit - : https://www.linkedin.com/pulse/shoe-in-booted-out-3-tips-your-job-hunt-jeremy-seeff?trk=mp-author-card https://www.linkedin.com/pulse/shoe-in-booted-out-3-tips-you...) then the customer could link straight to a question slot like: "Hey Jer, I'm applying for a job and your article was really interesting, what about XYZ?" - direct user engagement and possible client!