Personally, I can't afford to throw away $200 or $300 here and there every couple of months. Therefore, if I were considering purchasing a use-it-or-lose-it air ticket, I would ask myself several things:

1) Will I HAVE to fly? In the case of Boston, DC, Philly, and even Montreal, the answer may be that driving, Greyhound and Amtrak all provide reasonable alternatives, and thus, I do not need to purchase use-it-or-lose-it tickets.

2) If I MUST fly there, do I have a choice of different airlines? Southwest and JetBlue don't fly everywhere, so it's possible that if I MUST go, use-it-or-lose-it is my only option. In that case, I would go back to square one and ask myself if I REALLY want/need to go, or if I can substitute somewhere closer to home.

3) Finally, If I DO have a variety of options, what are they? Effectively, AirTran is NOT an option. American is not an option, albeit for a different reason. I have United miles, so they are a good choice. Delta, as well. But I really like Southwest's safety record. Not only that, but they are VERY user friendly as to re-using tickets, no change fees, and also, affordable. It would be really tough for me to purchase a use-it-or-lose-it ticket when SouthWest and JetBlue are more accommodating.

I'm just one person, but restricting these tickets is just going to push them all faster into bankruptcy, I'm afraid.