After you have signed up as a regular affiliate, you will have the opportunity to upgrade your account to the Sponsor level. With this level, your referrals will have access to a discount on their membership fee, saving them $20. Basically, you get $20 and they save $20.
With this discount, your referrals are more likely to sign up with ABPG, knowing that they will be able to save even more money. Your conversion rate will increase, which also increases the money coming back to you.
Another huge benefit of the Sponsor-level program is a 120-day cookie tracking length. Regular affiliate referrals are only tracked for 60 days. With the Sponsor level, your have 120 days of tracking, giving you double the time to make a commission from that referral.
More information is available in your affiliate account.
How to Become a Sponsor