Easter Egg - Invite 10 People and get free PLATINUM Account Invite 10 people to sign up Issuhub.com and you will be upgraded to PLATINUM Account from FREE or PRO Account. Existing PLATINUM users will be upgraded to ENTERPRISE. Valid for one year. Invite 30 people to upgrade from FREE or PRO Account to ENTERPRISE directly. Valid for one year. Note: Invited users need to register and activate their accounts. Please send the email addresses that you invited to firstname.lastname@example.org. After check we will upgrade your account.