Earlier quoted context omitted.
Such a dilemma, I can't imagine myself in your shoes. It must be nerve wrecking and life shattering!! Can't you just get a new throwaway email address and try the product and decide to keep or ditch it?
Why is this your first reaction? You really can't see why it would be better to have some sort of way to interact with the app before entering an email address?
Yeah I'm doubling down so the downvote goons can enjoy their field day to the fullest.