I would like is to send an email to my subscriber list of about 10,000 people asking them to refer their friends and they will receive one entry in our sweepstakes per friend. Is this possible wit...

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).