Ya, 19 swagbucks ... that's barely anything (say 15 cents?). The chance to win 1 million Aeroplan would probably be worth more.

Anyway, I found a cash back site that lists:
Buyer receives $0.75 cash-back rebate of each eligible transaction.
Eligible Transaction – a swap transaction of their miles or points into another program.

So not sure if that includes "exchanges" but we shall see.