We = Cape Radio is using it. Titan Network is not involved in Discord.
Costs are also free to make a Discord Server: Discord sells "Nitro" subscriptions to offset their costs of operations. Like anything else that's free for the most part, they'll start to turn more towards monetization somehow (in the form of ads, curation, or other method of getting paid content to user's eyeballs.) And it'll probably be sooner than later.
However, Discord tends to be more for gaming use: their text and voice channels are designed for gaming in mind. Privacy, threaded conversations, and keeping a server private aren't as easy as they'd be on a do it yourself chat service, or something more business minded like Slack or Salesforce. (Slack has the most parallels with Discord.)
