Frito-Lay's Skylanders: Spyro's Adventure promotion delivers a lesson: You don't always get what you want. Specially marked packages of Frito-Lay's Flavor Mix sample pack come with a mail-in voucher for an exclusive Skylander Sidekick figure. There are four figures to collect. but you may not get your first pick.
The scan below shows that you have to rank the figures according to your preference. If you have your heart set on Trigger Snappy and he ends up being in high demand, you may get Whisper Elf instead, as "Frito-Lay cannot guarantee that you will get your choice." Presumably, ranking all figures as "1" won't work. Although these figures are technically "free," a $2 shipping charge is required, and each figure requires a UPC symbol from the Flavor Mix pouch, which retails for $6.99. The figure will be mailed to you within 8 to 10 weeks of the voucher being mailed away. All vouchers must be postmarked by November 2 and received by November 12.
Long story short, if you want to get the figures you want (or all of them), act quickly.