Don't expect a reply. Despite joining many forums this year, the user doesn't seem to have made a single post. The USD in the user name is currency, other usernames have included EUR and CAD in it's place. suspect it has something to do with this: https://github.com/Microsoft/vstest
I'm not sure what that Microsoft link is above, but this is a test account for our new vendor service You will see them elsewhere on our sites, with the USD, EUR, CAD or GBP depending on what country we are testing from.
It's good to see that everything on front end is working as expected, and you, the community, are able to interact with the new vendors as they sign up!
Once we've confirmed everything is where it should be, we will be removing this.