No one says you have to eat the cereal, you could always just clip the token(s) before you eat the stuff - 8 boxes of cereal is a lot - and just take your time with the foods while you wait the 90 or so days to get your toy!
FYI - at ~$3.00 a box, you can get one with 8 tokens for ~$24 or up to 5 (!) for ~$55 with 5 tokens.
Czar "I wonder how many people getting these are over 8, and how many of those are over 18," Mohab
P.S. I think if you knew someone who bought, ate the foods, and was not using the token you could lower the price for yourself. Esp. if you knew 8 someones!