Sorry, I really don't know. A ticket broker called Ticket Mania was offering those for one month recently, just to readers of my newsletter. TM buys its tickets directly from Disney and every so often Disney offers its brokers special passes of one kind or another. Sometimes it's a 3-day Hopper Plus, sometimes a 4-day Hopper Plus, sometimes the special 5-day Hopper Plus with 4 pluses instead of 2, etc. Typically these cannot be publicly advertised -- they are intended for private distribution, which is why they can only be mentioned in a newsletter, etc.
Sometimes the brokers don't have anything but the regular tickets you can buy at the gate. All of this is really at Disney's whim.
Quite frankly I've never understood why Disney offers tickets to brokers that aren't sold at the gates, but it's kind of fun that they do, once in awhile. Actually, you'd be amazed at how many "non-standard" Disney passes there are out there. For instance, people attending conferences at WDW can sometimes buy half-day (after 2 pm) passes, or specially-priced limited-time-period Hoppers with Disney Quest included, etc. It's all very complicated, and only Disney knows why!
I guess the moral of the story is, if you see a "special" pass being offered that you want (through a legitimate broker like Ticket Mania or FloridaOrlandoTickets) better snap it up, because there's no guarantee it will be offered again.
Mary
MouseSavers.com