Which plan are you on presently? $25 for 1GB 3G plan?
If so, you may want to consider to change to the unadvertised $19 for 1GB LTE plan. YMMV, but some $25 customers who downgraded to $19 plan were about to keep the 30 GB loyalty add on.
It will automatically expire in 150 days. A few members have downgraded their plan so they can use up the data but later found out that they lost the bonus data once they downgraded.
@Kitsuk the loyalty bonus has a 150 days expiration, you don't need to do anything if you don't need it. But if your regular data all used up and the Loyalty data still not expire, you can then continue using data from. the loyalty data
This FAQ covers the rewards system change and the Loyalty bonus
