[uberman]

If thier project is an inspiration and you did not credit them then in my opinion that is a bit of an ethical problem. The other thing that comes to mind for me is that if you were inspired by their project why to contribute to it rather than create a copycat?

[lucgagan]

Theirs is a commercial project with MIT client. I made an open-source version of their project. (Their backend is closed source. I have no knowledge of it.)