I also find it hard to refer people, but those extra incentives do make me want to try harder for referrals. I think people who sign up end up not using the aff link(or bonus code) or whatever anyway, so rghy2 might be on to something with the option to give your referral a ticket or something similar. Even with the extra incentives it might not bring up the referrals though.. maybe try a "who can refer the most" in 2 weeks or a month if you do decide to add the incentives though.