The aim of the Affiliate Program is to encourage affiliates and ambassadors to spread the word about our product(s), not to get discounts. You are allowed to refer almost everyone. The only people you are not allowed to refer using your Referral Link are:
Yourself.
The company you work for.
Someone you add as a team member, or someone you become a team member of (under the Team Management feature of Hopscotch).
Everyone else, such as your friends, family, or followers are fair game!