As many of you already know, the master server returns 0 when looking to connect and play MP; up until recently, the only way to play the game in muliplayer mode was to have the IP of the server for your patched game. The official word on this, from what I have researched, is that both RTCW & ET are no longer supported. Which, I find odd, as RTCW is the pioneer in FPS! ...and it has stood the test of time A lot of people still play this game after this many years! There is an unofficial fix floating around the web for this...it isn't perfect, but it's better then nothing! Unfortunately, I am not at home ATM, but I will put it up as soon as I am able to.
You never put it up.
I'm sad to hear RTCW is out of commission though.