I finally gave up my seats this season after 9 years. I kind of miss having them but I just haven't been able to make it to as many games and had a kid last year so I would have needed another seat anyway. I got that same email today, I was surprised to see that.
You're lucky you still have your core group of people that buy from you. A lot of the people that bought from me moved away from the city and it became too much of a hassle to sell them online. The ticket prices are so high now that I was having a hard time breaking even.