Most cell companies only pay attention to the people who are behind on paying their bills. Boost Mobile is looking to buck that trend with a great offer to those who pay on time: a reduction in your monthly bill.
For every six months your payment is received on time on an unlimited plan, Boost Mobile will cut five dollars off of the monthly bill. This can only be applied three times, for a total of $15 off your monthly bill, but a $50 unlimited plan being knocked down to $35 seems like a pretty sweet deal. If you've already earned a discount, you don't lose it if you're late with a payment afterwards. Current Boost customers need to call customer service to opt-in to the program, so call them up and tell them you're ready for their "Monthly Unlimited with Shrinkage" plan.