You could try sending them a url in the chat section.Maybe a CPA offer that pays $1 per e-mail submit.I am not sure how much you will make but if you have more accounts like yours, it will work %100.Try to make the message less spammy and more user friendly if possible.EX: "Hi, something incredible happened today, I just received a free Ipad from this site.I am not sure how long it will still work but if you act fast, enjoy!".