Yes, you can integrate our widget into your website, then include a link to the page with the widget into your newsletter asking your subscribers to refer their friends. Also, you can paste our tracking script into a page that goes right after the registration/purchase (e.g. some "thank you" page) if you are wanting conversion to be a requirement for a reward. In this case, when a referred person completes the registration, the original campaign participant will get one entry/conversion. At the end of the contest period you will be able to reward the person or persons with the highest score(s).