I referred a friend on 29th January (send 1p, they sign up and spend £5, Ends 31 March) who made a purchase of £11.49 on 17th March. Neither of us has received the promised £10. I can't find any help for this anywhere.
The email states:
Why not invite a friend to PayPal? Send 1p to a mate
Even better, you can do this with up to five friends