Gamespot article reveals Valve's cut with steam sales.

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sales2099 said:

pezus said:

sales2099 said:
That isn't possible. Valve is loved by all and wouldn't do such a thing!

You mean, they wouldn't take any money? 30% does not sound like a lot to me, since it includes a cost for Valve (running Steam)

Id say thats a rather large cut they are taking. Like bordering on criminal.

I'm pretty sure that margin on PC software is 30%.  Though, normally in the retail channel, the retailer takes a hit if an item goes on sale.  I get the impression that on Steam, regardless of the price, Valve gets 30% of the take.  So if the game retails for $9.00 or $3.00, it's 30%.