Take a look at the App store for instance... apps published there have a potential audience of >20 million people, and yet Apple still only takes a 30% split of the revenue.
Either mods should be free, or the authors should get a fair share of the profits. Steam workshop is just an attempt to milk mod authors that want to make something amazing for the community turning it into a new revenue stream for the company. They don't even provide any active marketing/sales.
Amazing that Beth/Steam seems to think it is fair to slap together a basic distribution platform, and then charge for whatever they want to the random mainstream gamers that don't know any better.
It's basically like turning their modding community into a bunch of DLC content makers that work for free and see a tiny percentage of the profit.
Amazing.
