That said, if you see stolen content.. report it? Seriously, they have a report system for a reason. I'm pretty sure you may even be able to file DMCA's, although involving the legal system is a hassle.
That said, meh. I've said my piece. I really want to see actual metrics out of this before I make a judgement call.
They do that anyway. Seriously.
It is, and valve's 30% cut is standard. They do it to EVERYONE. But eh, I don't honestly care. Game companies tend to rely on sales of previous product between releases, and when you consider inflation, game prices are not rising in sync while game development costs are. What are you to do? It's why DLC is so pervasive. They need the money for various things. (Profits being one, but paying your employees between releases being another.)
That said, if you don't like it, don't pay for it or release for pay. Problem solved. (Incidentally, did you know you can't actually use Kickstarter and Patreon is a legal gray area, since you don't own the base IP? Something should really be done about that, but IP law is a hassle to redo - see the current patent troll kerfuffle.)
Anyway, I want to see the data. Does it acutally make modders money? If so, it's a worthwhile thing. Does it not? Then no, it's not.