When giffgaff first started there was no Super Recruiter programme.
You received 500 payback points for Every New Member that you recruited to giffgaff. These points were paid out into either Paypal / calling Credit in December and June of each year.
In 2013 the Pilot Super Recruiter scheme started. This was Optional and run alongside the normal payback scheme. You still received 500 points for your Activations. You also received £ rewards via Paypal each month for Your Recruits 2nd and 3rd top-ups.
In June 2016 The Super Recruiter programme as it is now started. Unlike the pilot it is Not Optional, You become a Super Recruiter as soon as your number of lifetime recuits hit 15. You no longer receive 500 points for new Activations. Instead you receive a reward via Paypal each month for Your Recruits 2nd and 3rd top-ups. Some tweaks were made to the new programme -increasing the award structure for high level recruiters and increasing the top-up period from 90 days to 120 days.
You can see the historic 2016 SR Announcements link here: