Right now, you can only invite 15 people on the site. If you have a blog or active social media account that will enable you to refer 50 members, you can contact the customer support. The OnePoll team will need to verify the kind of traffic you have before they assign you a unique link. The referral system uses your email address. The people you invite must sign up through the email address you used to refer them. If they don’t use the email, your account will not be credited.