of audiobooks, podcasts, and other original productions, while the Audible Plus tier does not include credits. Once a customer has purchased a title, it remains in that person's library and can be downloaded or streamed at any time. As of April 1, 2019, credits expire one year after issue, and credits prior to this day expire after two years. Original content In May 2015, Audible hired Eric Nuzum, formerly VP of programming at NPR, as its SVP of original content development. In 2016, the service introduced an on-demand service known as "Audible Channels", which features short-form audio programming from various outlets, including news and other original productions. Access is included as part of Audible's subscription, and also became available to Amazon Prime subscribers. Nuzum compared this strategy to original content created by HBO or Netflix, and stated that the service deliberately avoided use of the word "podcast" as to not alienate listeners unfamiliar with the concept. Among its original productions are Where Should We Begin? — a relationship podcast with Esther Perel, Sincerely, X''' — a podcast featuring anonymous TED Talks, Ponzi Supernova — a chronicle of the Madoff investment scandal, The Butterfly Effect — a podcast series by Jon Ronson chronicling the impact of PornHub on internet pornography, and West Cork, a true crime podcast investigating an unsolved 1996 murder in West Cork, Ireland. In August 2018, it was reported that Nuzum was stepping down, and that Amazon had laid off most of the short-form content staff. This move came amid a shift in Audible's original content strategy, including a greater focus on "audiobook-first" deals with writers. The service's new strategy for original content was announced in fall 2020 with the debut of a new lower-price tier providing access to "Audible Originals." The new tier, called Premium Plus, provided access at the time of introduction to 11,000 audio titles available only by subscription to Audible. These titles included earlier original material, plus new audio productions featuring such creators as Common, Jamie Lee Curtis, Kate Mara, Harvey Fierstein, Michael Caine and Jesse Eisenberg. More recent releases include Newark Mayor Ras Baraka's memoir and two works by Brown Sugar screenwriter Michael Elliot. Device support Audible audio files are compatible with hundreds of audio players, PDAs, mobile phones and streaming media devices. Devices that do not have AudibleAir capability (allowing users to download content from their library directly into their devices) require