Those fields were setup by default on our new platform when we switched over a year ago. They don't display anywhere and are essentially unused. I've removed those fields.
There no plans to add off-site contact information to member profiles at this time. One of the most common scams reported are off-site impostors on Discord and other chats, so I'm not sure if we'll ever add that.
We're making a large update to our message system that should be ready to launch in the next 30 days. The system will work similar to other instant chat systems like Discord or Skype, so it should be a significant improvement to the current chat.
