Continuing with the deviation: I agree that is amazing someone would pay that amount, but if I really wanted a "spectral tiger" (whatever that is) I would imagine it would cost me much more than $1,000 in opportunity cost to get one.
On topic: One month supporter is a pretty good idea. Not really necessary, imo, but couldn't hurt. I think people understand that they pay more for single items than you do for bulk. It actually annoys me when I go to a restaurant and realize their combo meals are the exact same price as totaling up the prices of the items al la carte.