It’s funny how Snapchat was huge in Europe like a decade ago, this was before it even introduced chat feature or stories, it was only disappearing photos, then it died, then 3 or 5 years ago Americans picked it up as the foremost alternative to SMS/iMessage, and at the moment the European Gen-Z is getting into Snapchat again, or so I believe judging by the sample of 2 (two) cousins I have
I think all non-Amazon readers support the full variety of ebook formats regardless of the source