3. Discord. This is another proprietary platform and many of the same arguments regarding GitHub apply here. It's an incredibly popular platform, and it's no surprise to find it landing on our shores. However, it is especially toxic for FOSS in many respects: it seeks legal action to prevent anyone from attempting to build software on top of it. It's a walled garden: Discord is an incredibly exclusionary platform which has countless accessibility issues for the disabled, poor, and many others.