Is this project open-source, under some open-source license? Back when we saw it a few weeks ago, it looked like it was an open-source project, but now it looks

Is this project open-source, under some open-source license? Back when we saw it a few weeks ago, it looked like it was an open-source project, but now it looks like you're charging money for it... but the source is on GitHub? Could you clarify the license / money situation?