The bet is for www.longbets.org/601, and does not include a http or https protocol. Amusingly enough www.longbets.org/601 currently redirects to longbets.org/601, though the detailed terms cover this.
The Detailed Terms section makes clear that it's for HTTP:
> …entering the characters http://www.longbets.org/601 into the address bar of a web browser or command line tool (like curl) OR using a web browser to follow a hyperlink that points to http://www.longbets.org/601 MUST …
