It is actually pretty common among Chinese companies. At least in Tiktok, where all software are internally developed (as explained in the article they use Lark

It is actually pretty common among Chinese companies. At least in Tiktok, where all software are internally developed (as explained in the article they use Lark, something similar to Slack). This gives them flexibility and usability as different softwares can interact seamlessly. For example you can click open a link to the document that other people are screen sharing during a meeting. But it also embeds your name on the screen so you probably don't want to take a screenshot or a photo. I know many companies also use techniques that generate invisible watermarks that are difficult to remove without breaking the image. I don't know exactly what the technique is, but maybe this is close: https://patents.google.com/patent/CN106384328A/zh https://patents.google.com/patent/CN106384328A/zh