Yep, when your looking for a streaming provider. Its good to test their servers out, to make sure the quality is acceptable and more importantly it all works flawlessly!
Personally, I wouldn't list servers on the site for anyone to log into at any time. DRS used to do this, but now they have stopped.
Problem with doing that is that you get all sorts passing by
, however I would always let a possible client login to my test account if they contacted be directly.