Bitcoinity.org decided to remove bitstamp from it's real time charts list, guess what is the reason?
1: Bitstamp has a 5K sell wall before $300 and bitcoinity doesn't like that
2: Bitstamp doesn't allow bitcoin to pass $300
3: Bitstamp refused to prove it has enough fiat and bitcoins after the last 17k coins hacked
4: Pantera Capital abandoned bitstamp and got their $10m investment back already
5: A bug or got deleted by mistake
You can still get bitstamp when you first time visit http://bitcoinity.org/markets.
Once you switch to other currencies or markets, bitstamp is forever gone off the list, you can only manually input http://bitcoinity.org/markets/bitstamp/USD to visit it again
Hmm, maybe it's mainly because of the trading volume in Bitstamp and nothing more? 1, 2, and 3 seems to be your own conclusions though, and aren't the real reason why they removed Bitstamp from their site.