Wtfpasscom -

The domain owner buys cheap traffic or uses SEO tricks to rank for random keywords. When a curious user types the URL, they are met with a pop-up saying, "Your access is denied. Complete an offer to continue."

No dot. Just one word.

A review of wtfpass.com indicates that the domain has been registered since 2010, but there is currently very little public information regarding its specific active services or user-base. wtfpasscom