If the organisation does not have any financial benefit from the use of the device and if they record and are able to prove that the person themselves are responsible for committing the final act, then how exactly will that be different from all the other organisations and the other processes used in Switzerland on a daily basis?
This would just be an equivalent of a different process, using Sarco instead of using pentobarbital, and paying for paperwork or paying expenses related to the funeral would be exactly the same.
I simply cannot understand how, if Dignitas can operate the way they do, any prosecutor would be able to successfully endanger anything related to Sarco. Switzerland seems to be a truly free country with a rule of law, so I predict a success for the use of the device in the end.