hummer010: Sure, bit it's up to the creator to decide to have valve charge at all. They could still publish for free. No one says they
have to charge anything.
Further to that, steam isn't the only game in town. What of nexusmods or moddb?
I think you don't get the point, seeing it only from the "Lawful Neutral" side. Being legal does not equal being fair or good, and I'm saying this a as law enforcer (well, sort of, at least). There are a lot of possible consequences coming from something apparently innocuous.
Does Valve impose someone to charge money for a mod? No -fact.
Does Valve directly *check* the source the paid mods came from (i.e. a pre-existing mod on Nexus)? No,
they ask the community to do their work for them -again.
Does this make incredibily easy for any exploiter to turn someone else's free work (as a part or as a whole) into paid content? Yes.
Does the vast amount of people in the field create an intricate mess where recognizing who owns what is difficult? Yes.
Is a lawsuit feasible in some of those intricated cases? Dunno, but it surely is expensive.
Will this bring "free" modders to abandon their work? Obviously, as they can hardly defend themselves from the exploiters. Hence why "free" modding sites will die slowly.
Will this help Valve in monopolizing the mod scene? Yes, since they created a giant legal problem only they can solve.
Edit: There is also the risk that companies will push half-finished products, using modders to complete and debug them... only, this time they will get nearly 50% (assuming Valve takes their usual 30%) from paid mods while doing nothing.
I will repat myself again...
Valve MUST be reported to the EU. Their monopoly has gone way too far, and now they can change the industry standards, single handedly and in just one day. Nice article form Forbes
here.
This in not simply evil, it is borderline criminal! They don't force you to do something, but the cricumstances force you anyway!