Newly formed service provider GiffGaff has been converting there users payback points into cash in which users decide whether to have the cash transferred into there paypal accounts, use as credit or to be donated to charity.
Users earn there points for helping out other users on there forums and signing people up to the network by giving out sim cards, one users has even managed to earn over £700.
On the company's blog they released stats for there first pay back period:
43% are getting a Payback
The average payback is just over £14
The biggest payback is an amazing £754
26% have earned £5 payback by getting a friend to join
29% have earned payback by helping in the forum