I was surprised to read that if Reddit had cut their ask in half, that would have workable for Christian. I expected that it would have taken an order of magnitude decrease to make financial sense. It really drives home just how unreasonable Reddit is and how dead set they are to kill all 3rd party apps.

I don’t think user voting in of itself is a problem. It’s the consequences of large negative voting that causes the real problems. In Reddit, a single unpopular comment on a popular subreddit could send a casual Redditor into negative karma which effectively shadowbans them from Reddit. As a result, you see people deleting their comments to stop the bleeding. Controversial opinions are punished severely.

Personally, I found that karma led to self-censorship of any idea that remotely deviated from the group consensus.

I agree; however, the second point I don’t see as Signal specific. In any service, how do you verify that a server is running unmodified open source code? For the vast majority of people, they are also depending upon the client being unmodified.

What security issues does Signal have?

RCS doesn’t have a cross-platform end-to-end encryption solution. For cross-platform communication, cross-platform 3rd party solutions such as Signal work well.