Referral code for green groups to use to raise money for our group

Hi, i’m part of Transition Towns Hastings and we are organising a sustainability festival to take place in September. Our theme is ‘What we can do’ and obviously an easy one to promote is that people can switch to a renewable energy provider. I wondered if Bulb would provide a referral ‘refer a friend’ code that we could use as a community group which would help us raise funds for our group at the same time?