Richard K
Favorite Answer
The TC designation is dynamic and can be removed if your percentage of BA and answers in a category drops below the Yahoo requirement. If that happens spend a little more time in that category answering questions and quite possibly you will regain the designation.
http://help.yahoo.com/kb/index?page=content&id=SLN4237&actp=search&viewlocale=en_AU&searchid=1343669754854&locale=en_AU&y=PROD_ANSW
Lucy S
If you don't continue to answer in that category and get best answers, the top contributor badge disappears.
Observer
If you charge to another subject other than the one you are a top contributor in it will do that.
Anonymous
You haven't contribute enough. Now do 100 pushups.
unknown friend
Someone else in YA answered your question well so I am just giving you the link to that to answer your question.