Why Samsung is paying more for an iPhone?

Trade In - Trade Up (https://www.facebook.com/SamsungMobileUSA/app_274103759364068)

If you trade- in Captivate you get $40, but, if you trade-in an iPhone 4 (released about the same time as Captivate) you get $145? So, Samsung is saying if you bought a Captivate you made the wrong choice?