I can understand your concern if there is no privacy policy nor documentation and whole thing seems like a black box. To be honest, the post on CNX-SOFTWARE was published a bit faster than we expected so we are catching a running train now :) Anyway, PP, ToS and documentation is the priority now. We would like to be as transparent as possible, most likely the whole solution will be open source in future. To your question about kernels: to simplify it for now, we are just modifying standard Armbian and Raspbian images available on their websites. Complete build process on our side is something we are considering to implement.