Thumb Score: +1

My double cashback promotion just expired so I called Discover up and asked if they had any special offers available. The CR checked and said I had a choice of $ 100 cashback if you charge $ 1000 in purchases in 90 days, —-OR— 1 year Zero percent interest on all purchases, minimum monthly payment required.

This is not offered automatically, you do have to call up and request it. It may be for preferred customers who are offered the bonus.