Credit: Kaitlyn Cimino / Android AuthorityTL;DRAudible Rewards is rolling out in the US for Standard and Premium members.The program offers discount rewards, referral credits, anniversary gifts, and credit promos.It also adds gamified listening challenges, tier status, and achievement badges.Audible spent years as the audiobook service for people who were happy to buy into a fairly specific model of paying a monthly fee that included a free credit each month. Earlier this year, it made a play for more casual listeners with its cheaper Standard plan, which lowers the monthly price but drops the idea that every book needs to be yours forever. Now Audible is adding another mainstream-friendly hook.Don’t want to miss the best from Android Authority?