I help maintain a pretty popular open source game mod. One of the features the mod provides server owners is anticheat, and one of the consequences of that is needing cheats in order to make sure the anticheat system works, to test exploits, and to make the game safer. Discord permanently banned the server and my account because we were breaking terms of service violations, even though we had blessing from the game developer themselves.

They later reversed the ban on my account, but kept the server deleted because they maintained that we advocated cheating. Again, we develop anti-cheat moderation software.

In my last contact with them, I was told that that it was up to us to moderate the server better too. If any user posted cheating related material, they would of course ban the server for terms of service violations anyway (this essentially inverts the typical idea of "safe harbor" protection that traditional websites have).

The problem with not using Discord is that they successfully captured the gamer and game market. As a game related tool, all of our users are on Discord. It's a shame that one company was able to do this.