When you put the @, it means that it is a tweet that is in reply to the user.
It is not all the tweets containing this user name.
Start your stream with :
Linvi
It is not all the tweets containing this user name.
Start your stream with :
fs.AddTrack("@BBC_TopGear");
Go to the BBC_TopGear account and reply to one of their tweet. You will see the reply added to your filteredstream.Linvi