Firstly, thanks for your votes and opinions. I find them really helpful
Secondly, I realise that I should have told you about the type of the project, as it is indeed not a game. Our project is a collection of servers that implement various internet protocols as well as other services (i.e. http, ftp, account services, search, project management, sql (based on sqlite) etc.).

We are looking forward to start an open beta test for the http and ftp server in the next weeks, based on the results of this survey.

I really like PHeMoX's idea by the way. A discount for active beta testers seems to be a good choice. We'll definitely consider this.

Michael