Update 2: Offer only applies to corporate markets. Affiliate market numbers will be rejected.
Update: According to RyderXtreme, the site is active, and the promotion officially began on October 1st…
Also, credits are processed within 24 hours, and are instant, and already being granted.
RyderXtreme just informed me of some upcoming changes to the refer-a-friend program for the holiday season. Until December 31st you will be able to get 10 credits a month, and the credit level has been raised to $50 a month.
Sprint has also setup an online form to request referral credits, so you no longer have to call #REF. The page is not yet up officially, but you can view it at the URL below.