Ugh, they are doing it wrong. Software with restrictions like that isn't GPL compatible. Full stop. In the parlance of the Free Software Foundation: Restrict

Ugh, they are doing it wrong. Software with restrictions like that isn't GPL compatible. Full stop. In the parlance of the Free Software Foundation: Restrictions like that violate Freedom Zero: https://www.gnu.org/philosophy/free-sw.html https://www.gnu.org/philosophy/free-sw.html In this case, there is a clear path forward: remove these restrictions from the FOSS apps and place them in the ToS of the services operated by Wire Swiss GmbH. It's obvious that Wire wants to be able to ban clients that behave poorly. (Like spambots, flooders, etc.) By presuming that all official Wire clients will always be good, they a muddling the issue. What they really need here is a ToS on their server. Basically: "You can connect here with whatever client you want, but we reserve the right to killban you."