A couple months ago, there were a few weeks that 930 had sold out shows 5 days in a row. Lately, it may be that many are traveling in the few weeks of summer that remain?
I would guess that obviously the economy is playing a part. Increase in prices is definitely not helping things. Earlier this year, I spoke to someone at IOTA and they told me the recession was definitely hurting them. I definitely don't buy merch / music, and limit my food / drink. I have gas to buy, and sometimes parking, so on top of the increased cost of a ticket, plus FEES, I have cut down my concert attendance.
(Oh, where is Rhett? Is that a whole other thread topic?)