Amazon isn't afraid to experiment, which is why we've seen the once internet-only retailer branch out and open physical stores as well as acquiring Whole Foods. But Amazon also isn't afraid to close down experiments that don't work or have run their course. That's why all Amazon Pop-Up stores in the US are now set to close.

Pop-Up stores consist of small kiosks typically selling a range of the company's own-brand products such as Echo smart speakers, Kindle ereaders, and the whole range of Fire devices. They also cater for trade-ins on old Amazon devices. You'll find them in malls, Whole Foods, and Kohl's stores, for example. In total, 87 of these kiosks exist across the US.

As Engadget reports, a spokesperson for Amazon speaking to The Wall Street Journal confirmed that, "After much review, we came to the decision to discontinue our pop-up kiosk program." The closures will most likely happen before the end of April, but for now it's unconfirmed whether Pop-Up stores worldwide are being closed down or just within the US.

As to why Amazon is doing this, the most likely reason is thought to be the very limited scope of the kiosks. Since they were introduced, Amazon has launched other retail stores offering a much wider range of products alongside those already offered by the Pop-Up stores. These other stores include Amazon Books locations and the much more recent 4-Star stores.

Amazon's 19th Amazon Books opened this week in Cherry Creek, Colorado and more 4-Star stores are planned. Combine that with Amazon Go stores and Whole Foods, and you can see why Pop-Up stores start to look like a presence not worth having anymore.