well..put it this way....this software is free. It is offered free in exchange for beta testers. People test/use it find bugs and feature requests and make the software better. In time, I will not be surprised if there are a paid version with full support and all.
ISPConfig 3 is open source software released under the BSD license. It is not a beta of a commercial product.
ISPConfig is also fully supported, see support options, prices and contact information on the ispconfig.org support page.