Hmm, it will become non-free from 1.40 on ?
Don?t get me wrong, I am sure you put a lot of work into the Mod, and I and I am sure many others appreciate that, but its not like this is a major Modification, and even the most of those are free. You sure you want to do that ?
This is not an offence or complain btw. , its just my oppinion. I love your Mod and I would not like to miss it, so don?t get me wrong.

But I am not sure making it non-free will make it get around much.
I?d rather offer people to donate for your work, I would even do it myself under these circumstances, but thats up to everyone else. But making it completely non-free, I would think about that again.
Take care m8.