Not similar at all. Restrictions on organ selling is because if it were legal, it would become very difficult to prevent human trafficking crimes or other case

Not similar at all. Restrictions on organ selling is because if it were legal, it would become very difficult to prevent human trafficking crimes or other cases where someone is coerced into selling their organs to some rich person who really needs a specific transplant. There is no such risk of people be abducted or blackmailed with violence to share their personal data to websites.