Previously https://news.ycombinator.com/item?id=14135045

(It's not enough to copy Snapchat - probably severely financially hurting them, by stealing their Prior Art - you have to do things like https://arstechnica.com/tech-policy/2019/09/snapchat-reporte... as well, and just remember: https://news.ycombinator.com/item?id=1692122)