their launch, they became more serious after Amazon announced a change in its payment services, which would lead to Subbable creators losing subscribers. As part of the deal, the Green brothers became advisors at Patreon. Green was one of the hosts of the YouTube channel for the magazine Mental Floss from 2013 to 2018. He had previously been a contributing writer for the magazine for a period in the mid-2000s and had co-edited the book Mental Floss: Scatterbrained, to which his brother Hank had also contributed. Alongside other presenters, like Craig Benzine and Elliott Morgan, John Green presented "The List Show" in which he listed off interesting facts centered on one particular subject. These episodes were directed by Mark Olsen and produced by John and Hank Green and Stan Muller. A new format, titled Scatterbrained, was introduced on the channel in 2018; Green was joined by multiple hosts on a single episode each week, which tackled one topic from multiple angles. In 2019, Mental Floss brought its YouTube production in-house and ceased using Green as a host. On February 20, 2014, Sarah Urist Green launched The Art Assignment, a PBS and Complexly video series in which artists encourage viewers to imitate their creative exercises. John served as an executive producer for the series. In September 2019, Sarah Urist Green, in collaboration with John and the Poetry Foundation, launched the YouTube channel Ours Poetica. The channel features videos of poets, celebrities, and others reading poetry. Poet Paige Lewis acted as the curator of the channel for the first season and Kaveh Akbar also work on the channel. Featured readers have included Shailene Woodley, Ashley C. Ford, Emily Graslie, and Samin Nosrat, among others. In June 2015, John Green and his brother Hank started a weekly podcast titled Dear Hank & John. Taking a mainly humorous tone, each podcast consists of the brothers reading a series of questions submitted by listeners and offering their "dubious" advice. The podcast closes with a news segment with two standard topics: Mars, presented by Hank, and AFC Wimbledon, presented by John. EcoGeek LLC, a company founded by Hank Green to support his blog on environmental and science issues in the early 2000s, was renamed to Complexly in 2016. Complexly became the umbrella video and audio production company which produces and manages most of the Green brother's YouTube shows, as well as a number of other shows,