Does anyone know if the grievance is legitimate?

I just got the game and I'm not familiar with the history here, but I am using the original mod in question. I did verify the files as well and they are indeed the same.

I'm not even sure how to see if Donation Points are enabled on a particular mod or author's account.

I don't mind mod authors getting some kickback if that's an option, but taking someone else's work is rather poor.

Edit: Looks like this mod was now taken down.

Edit: There's a forum post from the author of the mod in question that mentions talking to the Nexus staff.

Hopefully this was all just a bit of unnecessary drama.