GoDaddy forbids account deletion
support.godaddy.com
support.godaddy.com
Sure, you can mark the account as dormant and remove the authentication credentials, but at some point it's a matter of historical fact. Governments tend to prefer that companies keep accounting records, and look unfavourably on those that don't.
Namecheap: http://www.namecheap.com/legal/general/privacy-policy.aspx Scroll to "Personal Information Following Termination of Account"
I think it has something to do with the ICANN rules.
"Go Daddy complies with the EU Safe Harbor framework as set forth by the Department of Commerce regarding the collection, use, and retention of data from the European Union. Users in the European Union consent to the transfer to and processing of their personal information in the United States. We will respond to your request for access to modify or delete your information within thirty (30) days."
Also Namecheap's Privacy Policy looks like some boilerplate that has been copied from another source. The text for the section you identified is the exact same as GoDaddy's, and many others[1].
[0] - http://www.godaddy.com/agreements/ShowDoc.aspx?pageid=privac...
[1] - https://www.google.com/search?q=placed+in+deactivated+status...