They are refering to the crypto payment option that was build into the messenger a while back. Never used it and it never bothered anyone. It just isnt very well recieved as a feature in a secure messenger.

https://www.androidpolice.com/2021/04/06/it-looks-like-signal-isnt-as-open-source-as-you-thought-it-was-anymore/

https://www.xda-developers.com/signal-updates-public-server-code/

https://tech.hindustantimes.com/mobile/news/signal-updates-its-open-source-server-code-after-nearly-a-year-71617778373810.html

Look into their MobileCoin and how they implemented it. They are just banking on people forgetting about it.

Anybody pulling these antics with a cryptography product loses my (and others) trust immediately. I’m a security soft dev, and my colleagues and I migrated to Element and Matrix network when it happened. I remember the disgust vividly.

Of course all of this is not going to be the Signal wikipedia page… It’s amazing how their fanbois work.