Of course everyone has had problems with multiplayer. I too have done multiplayer. I created a chat and some small game for 2 players. Worked great. Never tried more because I don't have the people to test more, but I don't think it's all that hard to create a 24 player game with GSTNet or raknet, or even create your own plugin. I found a good network tutorial, and I'm sure there are more. As I said, advertisement of gamestudio never stated it was all possible with only the native functions. It just stated that it is possible. Whether you think that's a lame argument or not has not much to do with marketing .

No, most of the forecast things are not available in plugins, but multiplayer most certainly is. Nsf42 made GSTNet, and you get alot further with it than the native functions. A browser plugin, on the other hand, is not publicly available at all.