If the ms App Store is successful, then it is the end of valve as we know it today, so it makes sense for them to invest what is a relatively small amount (10 p

If the ms App Store is successful, then it is the end of valve as we know it today, so it makes sense for them to invest what is a relatively small amount (10 people at $150k/year for two years is just $2m - do they have that many people on it?) The majority of the cost is actually borne by the studios/developers - compatibility testing and fixes - for little pay now (though possibly nontrivial one in the future). So it doubly makes sense for Valve