When signing up using a friends referral link, I got the email confirmation;
Welcome to Bulb! Once your switch is all done and dusted on 5th May, you’ll get £50 credit into your Bulb account. Great work going green.
It’s been over a month since then and nothing has shown up on my account nor my friends. I emailed support a week ago and they said they’d look into it and I’ve heard nothing since.