I only had a few hours of sleep, so let me rant a bit:
Valve is monetizing something they don't offer support for past the 24 hours after you bought and the "support" consists of getting your money back and I'd be surprised if it's full refund instead of just steam wallet money. There's zero quality control, which is terrible, as shown by the mobile market. Saying that you can report infringing mods is bullshit, you can't leave yet another aspect of selling them to the community - policing that you sell legal content. For this system to be fair and not to be ran to the ground by those seeking to exploit it, modders have to play whack a mole with those trying to make 100 $, while Valve has no responsibilities. I repeat: if you are a modder for a game that has paid workshop, you have to deal with another layer of bullshit to not be exploited. Now don't get me started on mods that were made by several people, or spawned off of other people's stuff.
There is also no guarantee that what you bought is even going to work together, unlike TF2/Dota 2 where the stuff is rather small and self contained. Who is going to give you your money back when the mods update and break the delicate chain you created, not to mention how is this shit supposed to work without SKSE/Mod Loader, which exist for almost every game that's heavily modded. The workshop is extremely limited when it comes to the breadth of tools most games get on top to make mods work. I'm sure whoever made this decision will get nice review in Valve for making them money, but it's 50 shades of bullshit. The cut modders get is the smallest part of the problem, but to see somebody charge 75% cut for what amounts to adding a cash sign next to your stuff is not helping.