Is there a chance to provide a demo with exe and free c files, to test it in action very fast?
What about a demo of a simple game - maybe, the 3D Chat is already such a thing - which can handle the maximum of players?
Put a big watermark on the screen and a link in the menu to your tool, and it is a great advertisement. Even better is a permanent server. (I hope you don't mind my dreams.)
The best would be a game demo which uses all the given features, though. (Although, it is unrealistic to ask for that. )