Your project is very useful and promising, but I am afraid of situation where you will not develop it anymore. In this case nobody will be able to continue your work because code is not published and perhaps you do not have team of developers. Don't you plan to commercialize your project? It would be better alternative for many developers to pay, than to loose perspective of project maintenance. Alternatively you could publish source code of the project under GPL or MIT license.
Thank you for your work anyway!