On Friday, Dennis Publishing announced that it was shutting down the print edition of Mental Floss magazine after 15 years, reports Politico. The November-December issue will be the last print issue. Magazine co-founders Will Pearson and Mangesh Hattikudur explain the reason for the decision in a note to readers:

“We’ve loved creating a print product, but fighting for space on the newsstand and Pony Expressing issues to doorsteps are no longer the best ways to get you the stories you want. There are more than 20 million Flossers reading and watching Mental Floss online, and for us, it feels like there are so many opportunities for new adventures. We want to build a stronger digital community. We want to find new ways of telling centuries-old stories. And we want you with us,” Pearson and Hattikudur wrote.

If you aren’t familiar with Mental Floss, it is a quirky, fun title with an interesting mix of seemingly-random information including facts, questions, lists, quizzes, trivia and articles like How Astronauts Put on Space Suits, the German Teens who Rebelled Against Hitler, and 16 Expletives We Should Definitely Bring Back. It is funded, in part, by newsstand and subscription revenue, advertising, and sales from the Mental Floss store.

Foster Kamer, the magazine’s executive editor, wrote about the end of the print edition on Medium Friday. Among other dues, Kamer edited Chatter, the magazine’s letters page. Kamer recalled some of the more moving letters received over the years.

“We got letters like that for every issue: People whose lives were somehow made better by our magazine. And we weren’t publishing earth-shattering exposes, or saving the world – our magazine was, at its very best, a magazine for people who loved magazines, who wanted magazines to be fun, funky and weird, and who loved learning about the world through those kinds of magazines. And our readers loved this magazine. It brought them together, it bridged gaps,” Kamer said.

“The magazine was a funny, sweet, smartassed, and creative labor of love. It didn’t export to the web perfectly, if well at all, but then again, it wasn’t really supposed to. It was built with the experience of curling up to a whole object (a magazine) in mind, and savoring cover-to-cover coherency, the kind structured around ideas about editorial structure few publishers subscribe to in 2016 (pun genuinely unintended),” Kamer added.

Kamer described the demise of the print magazine as a business decision made by the publisher and the environmentally-focused trust that acquired the magazine in 2011. Kamer will be leaving the magazine to explore new projects, as will art director Winslow Taft. Jessanne Collins, Mental Floss’s editor and chief, will become director of multimedia.

What’s next? According to Politico, Mental Floss will focus on more long form pieces, as well as digital and video and on MentalFloss.com which draws more than 20 million monthly unique visitors. That’s quite a contrast to the magazine’s print circulation of 100,000. According to Mental Floss, they have had 161 million video views, 1.3 million YouTube subscribers and 1.7 million Facebook fans.

“The growth we have realized has come about as we’ve transitioned from our legacy print product to a powerful digital and video brand. And while we are incredibly proud of what the magazine has accomplished, we have decided to complete the transition to a digital company and will cease publication of the print magazine at the end of the year. This was not an easy decision, but we are forever grateful to everyone who’s ever been involved in producing it and equally grateful to all of our readers and advertisers…,” Hattikudur and Pearson said in a statement reprinted by Politico.

Insider Take:

We are always sad to learn when a newspaper or magazine shuts down its print operation, but it is sometimes necessary when organizations haven’t figured out the right mix of print and digital content and revenue. In this case, it doesn’t seem to be a lack of print revenue, so much as a shift in direction. Rather than continuing to invest in two different products, the company is focusing on one – the one that is drawing the most readers.

Mental Floss is a privately-held company, so it is not required to supply financials. Owler estimates that annual revenue is $9.5 million. Based on circulation figures, we presume subscription and newsstand revenue made up a small portion of that total. It is not yet known if or how Mental Floss will attempt to recoup any lost newsstand revenue or if it plans to implement a paywall or offer digital subscriptions.