The fields were first name, email and Instagram ID. Obviously they need email because that's how the details will be sent, but Instagram ID? It's been a thing for a while that you can sign up to things through FB or with email, but I always use email because I don't trust FB and don't want Meta knowing more than it has to about me. I'm fine with a choice, but this site is both email and Insta which I find a bit weird.