Last month, my mom decided she wanted me to "refer" her to Wells Fargo just so she could open an account and get a free stuffed animal - a Wells Fargo Express Pony, to be more specific. Supposedly, these things are collectors items, especially since you can only open so many accounts.
Anyway, my mom made me wait for an hour while she opened a new account. At the end of the hour she found out there were no ponies available, and the Wells Fargo representative gave her an "I owe you." We went back later for the pony, but it still felt like a lot of work for nothing.
It does go to show, however: customers like perks and will jump at any opportunity to receive free stuff.
What deals have you offered to get customers interested?