Sins will be on steam as soon as Valve offers his titles for Impulse. Steam also has an annoying DRM shceme. No thanks!
Quote from Kyro on 2-29-2008
Putting Sins on Steam would be require us to abandon our stance on copy protection and DRM--Hassles just to run games offline, a loader that wants to run all the time in the background, and disc checks on retail copies ON TOP of the online DRM? No thanks.
Quote from Yarlen on 2-29-2008
When Valve gives us all of their exclusive games, we'll consider doing the same.
Quote from Frogboy on on 2-29-2008
I like Steam but it doesn't make sense for Stardock or Ironclad for Sins to be on it. When someone buys Sins digitally from Stardock, Stardock and Ironclad make the maximum amount of money from the transaction.
When someone purchases it through a third party, then there's obviously another party involved in the transaction. Therefore, it's a question of how many more sales would be gained from being on Steam versus the number of sales we would lose on direct sales. In reality, most people remotely interested in this type of game are going to know about the game between now and the end of its effective lifetime. And there's really no barrier to entry in purchasing it directly from Stardock digitally.
Also, Stardock has millions of users using its system as well. Our user base isn't nearly as big as Steam's but it's pretty substantial. So those who argue that we should put our games on Steam could make the same argument that Valve should put HL on our network. But i don't think anyone thinks that will be happening any time soon.
And with the upcoming Impulse release, and with major publishers signing on to put their games on it, I think there's very little incentive for us to put our titles on other networks.
Now the thread is over! 
Edit quotes taken from this thread - https://forums.sinsofasolarempire.com/301872/page/1