What Does The Rise of Disposable Cameras Say

Many in the full-frame world had not predicted the comeback of film or retro digital cameras. They were too focused on dissing APS-C and the lack of features in the smaller cameras. What is interesting to note is that while retro aesthetics are back, a part of this is also now contributing to the sales of Kodak's disposable cameras. That does sound interesting. But what or who are the reasons behind this peak?