Yes, I am going with Sprint 1 year free again.
Just pining for another Mint promo for those who prefer T-Mobile. Coverage area is different and for some, it's worth paying a little bit for better coverage.
The Cricket offer requires buying a $10 Cricket SIM, and either a $40 or $50 refill card. With the smaller refill, you're paying $50, and get a $50 discount on the price of the phone.
Although it's advertised as a $50 phone discount, It's probably better to think of the Cricket & AT&T offers as a free month of service included -- and that's the way mmfacemm has presented the offer above..
It is possible to resell the refill card. For example, one of my co-workers uses Cricket, and will gladly buy the refill card from me at a discount.