When I was at SCI last, they still had a gaggle of smarts and I was told that only a very few were actually 'orphans'. If I was told correctly, smart centers are 'allocated' "X" number of cars per month. If a smart center has only 15 cars (due to the economy, you KNOW they're not getting the reservations they are accustomed to) "reserved" in a month and their "allocation" for the month is 30, then they're going to have 15 cars for the general public.
We're getting a few more cars here in the US than last year and the demand has decreased.....hence MORE ON THE LOTS!