Plazilla is open and clear about account removal, see the direct removal link. All your data will be deleted (including your potential source of income, so).
URLS:
http://plazilla.com/
http://plazilla.com/remove-account
Please note that AccountKiller.com is not associated with the business listed on this page. AccountKiller provides easy-to-understand instructions and guides on how to cancel charges and relationships from the list of businesses on our site, we have no affiliation with these businesses.