I have mixed feelings about this, and I guess it really comes down to how you view rushes/lotteries philosophically. Rushes seem more oriented towards rewarding dedicated fans, students, and others who may not be able to see the show at full price but can "pay" with their time and effort. Lotteries are a little dicier since they require much less of the aforementioned commitment. They draw a bigger crowd and thus more attention to the show, and as other posters have noted, incite even losers to buy tickets. Shows like Matilda and Aladdin have switched to lottery systems when they became such hot tickets that their rush lines were uncontrollably chaotic. Similarly, flops from Annie to The Last Ship have confidently opened with lotteries only to draw smaller and smaller crowds (a little embarrassing).
I'm inclined to believe that these sorts of cheap ticket options should reward dedicated and committed theatregoers first and foremost, exchanging the fiscal cost of a ticket for the cost of waiting in line. I understand as well why shows switch to lotteries. But the digital lottery trend is a bit troubling, as it takes any commitment or effort out of the equation, diluting the entry pool and making it MUCH harder for ANYONE to win. This may sound like snobbery, but it does bother me that digital lotteries (when they replace rush completely) deprive dedicated fans and younger theatregoers of the chance they once had to see a show.
I'm not entitled enough to believe that any producer is REQUIRED to provide a rush, a lottery, or even a digital lottery to allow for cheap tickets - however, it seems fair that any show with a digital lottery ALSO include a rush option as well, allowing for both sets of potential theatregoers to have their shot.
Formerly SirNotAppearing - Joined 3/08