Couple questions and observations:

What are you asking for in the "Linked Profile URL" field. "https://gosauber.com/register" A link to one's profile on truepeoplesearch or the like? It isn't clear. (And it also might imply a user's info would only be removed from that site).

The navigation links on the top ("features, "how does it work", "plans", etc) only work at the root url of your page. They don't function on /register or similar because they point to html IDs on the landing page, not a full or relative url path.

Again, great idea!