How often and how are referral fees paid out?

Can I choose my own Promo code?  Just numbers or numbers and letters?

Is there a limit on the number of referrals you will get paid out on?

Is there any particular reason you are significantly more expensive than Carbonite?

Your current cheapest plan is $15/month for 50GB of storage.  Carbonite is unlimited* for $59 per year

*First 200GB is fast, after that is slowed considerably.  So soft cap.