This doesn’t really make sense to me, what do you mean? Client-side you do different computation for sealed sender delivery/receipt. What’s your normal standard of trust that a hosted, open source project is running the same code that they’ve made public?
I think if they store any metadata that we don’t know about, the lie runs very very deep, like to conspiracy theory levels that don’t really make sense for a registered nonprofit: https://signal.org/bigbrother/
In regards to Signal, this is largely not true. Sealed sender has been signal’s metadata hiding protection for like 6 years or something. The only information signal has is your phone number, your account creation time, and the last time you contacted their servers.
They also have a server implementation on github, so it seems to be open source to me. (I could be missing something though)
You are right though, that it uses centralized servers and requires a phone number, which are sticking points for a lot of people.
I don’t really understand all the hate/cynicism towards vegan leather. Like yeah obviously plastic is bad for the environment, but raising cows and dumping thousands of tons of chromium into rural waterways for the tanning process aren’t good either. Leather is actually far worse for the environment by some metrics.
Plus there’s the fact that most leather is sealed with plastic/acrylic to increase its longevity anyway, unless you’re buying something wicked expensive.