Affiliates
The affiliate program is Whop only. Open Affiliates, join there, and use the share link Whop gives you. Whop pays 15% when someone buys Pro ($19/mo) or Business ($49/mo). Invince does not hold that payout.
Share links that include Whop’s ?a= code are what checkout attributes.
A separate invite link on Profile can add one extra free check when a friend signs up. That is not the affiliate program.