It seems like a pretty good idea to me, as GC do get their planned stuff out eventually -- so the risk of throwing money away is low -- and with the cash there in advance they'd probably be able to get it done quicker. With the risk of non-fulfilment low and a decent chance of it getting there earlier than with no kickstarter, and the normal break on the RRP backers get, it seems to me that it'd be better for both the customer and the producer of the material (GC, in this case). It's also particularly handy, as I understand it, for getting print runs done.