User blog comment:MisterWoodhouse/The Official Discord Server for Fandom and Gamepedia Editors/@comment-5301680-20190708163335/@comment-20644-20190708202945

We have a similar line in our Terms of Use. It covers our ability to collect data that we need to effectively run the site. It does not mean we sell it. Discord does not sell user data either.

I'd note that their clause refers to how it's subject to the Privacy Policy. You can read about the use cases here in the "OUR DISCLOSURE OF YOUR INFORMATION" section, which is all fairly standard stuff and explicitly says that they are not in the business of selling user data.