I'm not saying it's a perfect service, I'd rather all private messages be E2E encrypted, but there's no evidence Discord themselves have ever sold any data, so I don't understand why we are making crazy claims when them collecting data is a privacy issue enough on it's own.
Calls recently got encryption, so while Discord is as popular as it is, we can only hope they keep expanding encryption into other areas.
Can you provide a source then if it isn't true? I am genuinely curious.
And yes, they did publish the code for their e2ee protocol.
The whole internet is the same, unless you are running all your own built software that you can vet, you are just putting faith in what a company/individual is telling you. If you want to use the internet, there's always the inherent risk your data is being collected and sold without you knowing.