They clearly spell out in their privacy policy that they respond to warrants.... > We will only disclose the limited user data we possess if we are instructed

They clearly spell out in their privacy policy that they respond to warrants.... > We will only disclose the limited user data we possess if we are instructed to do so by a fully binding request coming from the competent Swiss authorities (legal obligation). While we may comply with electronically delivered notices (see exceptions below), the disclosed data can only be used in court after we have received an original copy of the court order by registered post or in person, and provide a formal response. It would also be nice if they were allowed to notify the customer but I'm not familiar enough with Swiss laws to know if they can.