People in the user forum (https://community.signalusers.org/t/where-is-new-signal-serv...) and in other places on the internet were upset for months, because the server wasn't being updated anymore. At the same time, Signal regularly tweetet that "all they do is 100% open source", even at a point in time where no source code was released for almost a year.
Just 2 days ago this was getting picked up by some larger tech news platforms:
https://www.golem.de/news/crypto-messenger-signal-server-nic...
https://www.androidpolice.com/2021/04/06/it-looks-like-signa...
It's normal that Signal ignores its users, but apparently they didn't even reply to press inquiries about the source code. All it would have taken is a clear statement like "we're working on a cool new feature and will release the sources once that's ready, please bear with us". Instead, they left people speculating for months.
This communication strategy, combined with the cryptocurrency announcement, may cause serious harm to Signal's reputation.