Yeah well, some people enjoy BnG enough to learn more complex shots, some people don't.
a2b is hosted on the sfx clan server, currently the domain is ran by CyberShadow or Deadcode, I forget which one.
3 years ago I quit b2b and stopped playing BnG, for some reason everyone else pretty much stopped playing too, so M3ntal saw no need to keep the server as a2b was the main reason for having it, but CS/DC decided the website/League is a good piece of Worms history so they chose to take care of it instead.
Recently there has been a pretty nice revival of BnG so I asked M3ntal if he could revive a2b, and here we have it