Of course you require an email address to calculate that. In the last step of the form. A form that asked me for information which is very relevant for targeting me with adds.
It only calculates odds for 5 countries at the momenet: US, Australia, New Zealand, Canada, UK; which also really isn't revealed until the very end.
We send absolutely no spam. As explained in other comments, this is a regular website sign-up (the copy is now improved to be clear about the e-mail) and after the results, we hope to see you in our immigration newsletter [0] via Substack (a company funded by YC and A16Z).
Thanks again for the feedback, I've just added a copy to explain that but I need to re-think the entire sign-up flow.
Edit: Mentioned that I have now updated the copy.
When nothing is said or obvious to find, I assume the worst, and so I didn't complete your form.