My husband and I both got the same 5-usage=$15 Amazon.com GC with our Chase PC Visa. We also do not use it much.
Other Chase offers:
Amazon.com Visa: Charge $100 and get a $10 credit
United Mileage Plus Visa: Double miles
Rewards Visa (used to be GE Rewards Visa): Double points on 4-5 categories (I think they are grocery, home improvement, gas, drugstore).
All of them are automatic (ie no signup/preregistration needed) and run to the end of the year or slightly later.
Yeah, we have a lot of cards...