SumoX: People thought I was nuts for not wanting to put all of PC gaming's eggs into one (Steam's) basket. But this is what happens when you have "everything under one roof." Now, how much resistance can you provide if you have thousands of dollars tied up in the service and because of that, most games are now requiring it?
The worst part is Valve is allowing you to include other author's work if it's free- so essentially now you can profit off of somebody else's work. And I really doubt Valve has the manpower to track down and verify any broken license agreements- at least when it was free for users, you might have broken the license, but there was no revenue to create a legal liability.
Unfortunately, I still see PC gamers on other sites defending Valve, so expect things to get worse before they get better.
Sadly I also know too many PC gamers who believe Steam *is* PC gaming. So I agree, Valve would have to do much much worse before a significant portion of their users leave.