Matthias Melcher is a user on You can follow them or interact with them if you have an account anywhere in the fediverse. If you don't, you can sign up here.

Strange. The Home tab says "You aren't following anyone yet." while the profile has the numbers correct. Tested with IE, FF, Chrome.

It was not easy to follow someone from a different instance. Simply clicking "follow" only resulted in an unhelpful error message. So I had to type into the search box, click the result and find the Follow button.