They recently added support for in-app donations: https://www.theverge.com/2021/12/2/22814934/signal-launches-in-app-sustainer-program-donations-messaging-secur

They recently added support for in-app donations: https://www.theverge.com/2021/12/2/22814934/signal-launches-in-app-sustainer-program-donations-messaging-secure https://www.theverge.com/2021/12/2/22814934/signal-launches-... I hope they'll take it a step further and require payment for certain functionality (maybe video calls?, or desktop client support?).