Their referral scheme is a scam. They make it deliberately complex so that they can get out of giving the rewards. I received a code which I provided for a neighbour whose application I filled in for him myself. I used the link I sent him and there was no reference number to input. I expected the initial code I sent him with the link would have sufficed. Then after a series of frustrating emails and long delays in getting a response form them I was told that even though my neighbour subscribed to the 500 programme for broadband and I provided his email and details the decision was from Hyperoptic that we are not entitled to the vouchers advertised because a further reference number was required in the application. Clearly, if there was any intention of honouring the promotion they could easily have confirmed the new subscription from my link code. The conclusion to be drawn is that the whole promotion to get customers to refer new customers is a scam.