Umbrel said in June 2022 that they are not prohibiting running shops, but I'm not sure about now, because they only recently (and secretly) introduced these TOS, which try to restrict what you can do with your node. Even saying "Don't do illegal stuff" restricts your freedom to do so, and it seems to apply US laws everywhere (Not a lawyer, so I may be misunderstanding point 11).
Also dangerous is ". You may not reverse engineer, decompile, or disassemble the software, except as permitted by applicable law. " -> Umbrel sometimes keeps code closed source after releases for some time, and this essentially forbids anyone from trying to figure out what it does in such a case.

Disclaimer: I develop a noncommercial FOSS umbrel alternative at https://runcitadel.space that will launch soon, which also includes features like HTTPS to make running shops easier.
Thanks Aaron for your comments. I actually asked them now to clarify in their website. I am not from the US, but I still would like an answer from them. Also there are the LNBits shop extensions (nostr and web) that I would like to offer in the future. This TOS are not clear about it either. Good to know about Runcitadel update. I tried it last year (feb 2022) and it worked great (was like the 2021 Umbrel UI which is great). I am a bit more used to the current Umbrel UI, but if I cannot stay in Umbrel I would def go to Runcitadel since I have used it before. Https not an issue for me since I use a tiny vps proxy for traffic with tailscale. When will you launch it?
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I read there is point 20 20. Open Source Components This Agreement acknowledges the use of open-source components in umbrelOS, which are governed by their respective licenses. Users must comply with the terms of these licenses when using the software. I do not know if I can freely use FOSS like BTCPay within non FOSS like Umbrel.
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Most software allows it because they run in Docker. But AFAIK, you will definitely not violate any license, if including an app like BTCPay in Umbrel would be forbidden, it would be Umbrel's responsibility, not yours.
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