Does a user need to invite his/her referrals to register with GokuMarket again, in order to become part of the Affiliate Program, so they can earn Affiliate Rewards from their referrals?

No, the same structure applies that users have built with the Referral Program and the Affiliate & Referral link to invite new users is the same.

The only difference is that the Affiliate Program is by invitation only. The AI Bot + DeFi product is only available for affiliates. 

To become an affiliate, a user must first have a sponsor. Then to qualify to earn upto 20% Affiliate Rewards, the affiliate user should also have purchased an Affiliate Program product like the AI Bot + DeFi.