You can invite an unlimited number of friends in the referral program. You will earn a bitcoin reward after their first purchase from a certain amount shown in the app.
How to invite a friend
You can invite a friend in the Earn tab of the app. Spot generates an invite code for you, that you can share now! When a friend you invited accepts your invitation, you will earn a reward in bitcoin after their first purchase from a certain amount shown in the app.
Share your code by tapping on this button from the Account tab > Invite friends