The point of the license is that using the program after the 30 days, technically, is illegal. Khaled could've put in something to stop the program from working after the 30 day mark, but decided not to. I, for one, was glad of this, since, being on a limited income, it was more than the 30 days before I got my code, since I had to send the money via money order, so I wasn't without the access during the extra few days that it took.
Khaled has worked very hard on this program, and most people will agree that it's a good program, and well worth the $20 to register it.
One other thing, is that when you do have your registration key, the little pop-up reminding you that you have so many days left to register will go away.