Does anyone know what dotcom partnerships and individual/influencer affiliate programs Discord has done?

For a while, I saw many subreddit mods pushing Discord in side bars and stickied posts, often with language that suggested it was an official Reddit counterpart to the sub.

I supposed it could be that Reddit management was choosing to siphon off its own user base and influence to Discord. But my suspicion was that it was more likely the action of one or more mods of the sub, and then question would be what was their motivation.