Then why did EA create the Origin service and cut back support of Steam? They obviously felt there was more profit to be had by not working with Steam.
Here is a question, does Valve get a cut of all sales that go through Steam? I had assumed that the answer was yes, but I don't know for sure.
Either way, Steam is a store basically and Valve wants to create an OS where Steam is front and center, providing you with a complete gaming experience. They want you to only buy from their store. Compare that to Windows today. MS has a Windows Store where they also take a piece of each sale. The difference is that their is already a strong pc gaming market that is open for anyone to use and MS has done nothing to get in the way of that.
You're right, however it isn't that they could make more money off their games by not going with Valve, but rather they were likely more influenced by the potential of money they could MAKE by having a similar platform on their hands, with big "AAA" games to back it.
If they really cared about the money they could make for a single game, they'd have released to Steam considering most PC gamers are on Steam and made a buttload of money. However, by pulling people onto their platform, they're making an investment to make more money in the future. EA is thinking big picture here (and not of the Steam kind lol).
As a gamer, I welcome more competition at least. Though, I still stay a bit wary of EA just because of their history and continued practices.
Edit - Also, I like how negative some people are about Steam OS, being quick to dismiss it entirely while Microsoft prefers to pay attention to what's going on. Just goes to show that sometimes the fans are much worse in how they put on blinders to ignore everything else, than the companies they actually support.
"The announcement was only made last night so I'm still studying all the facts Valve has released. But Valve is a very impressive company, and obviously we're going to be watching what they do with great interest." - Phil Harrison