Ha ha, I love this guy.
I did think to myself a couple of months ago how pissed off everyone would be if they suddenly revealed on April 1st that they were having a laugh and Blue didn't actually exist.
But seriously, check your facts before you start making accusations. They have http://www.mtasa.com ready for San Andreas, and if they didn't have it, http://www.multitheftauto.com would do just fine.
Also, SA hasn't even been released for PC so they don't even know if it's possible. That's why they're making Blue for Vice City. People with half a braincell couldn't grasp the concept of 0.4 supporting both GTA3 and VC so they may not go for a multi-game client again, at least not soon.
Btw, they affiliate with sites that do not make a profit either, except for All Seeing Eye, but that's probably part of their terms of contract for using their SDK.