I love flameshot! It is super useful, so simple to use and trade-free 🙂 the only thing worth mentioning is that you can upload screenshots directly to imgur and share that link with others. imgur has it’s own rules: https://imgur.com/rules ,terms of service: https://imgur.com/tos and privacy policy: https://imgur.com/privacy – so I don’t know if the screenshot (once you upload it to imgur) is shared public or private. But flameshot itself is trade-free since it doesn’t want anything from you: no data, no currency, no attention (via ads) etc.