PayPal Refer a Friend - Send 1p and You Can Get £10 - Invite Upto 5

https://www.paypal.com/uk/webapps/mpp/invite/terms

1) Send 1p to a mate who doesn’t have a PayPal account

2) Ask them to sign up and link their bank account or card

3) When they spend or send £5+, we’ll send you both a tenner

Even better, you can do this with up to five friends, so you could get £50 for sending 1p to five friends (just don’t forget to remind them to send or spend at least £5).