directv now 1-month accounts on ebay - how do they do it?

[tmc]

I see these directv now accounts that are valid for 1-month on ebay:
http://www.ebay.com/itm/Offer-Endin...-1-Month-Pass-HBO-CINEMAX-STARZ-/162585568064

I am curious as to how they do this.

Do they create a trial account using a promo code such as this:
https://slickdeals.net/f/10204684-1-month-free-directvnow-on-roku

and then cancel after a month?

Seems like a lot of trouble for $10.

Any ideas ? Thanks.