Instead of working and competing, they will sue until there’s no tomorrow.
why? Valve obviously have more money than them. EA and etc have shitloads of cash. Do they have "majority of PC game sales" cash? No. They have "generic sports game annual release" cash. while that is a lot, it's not the same ballpark.
with this shit it just becomes "throw money at lawyers until you win" and Valve have more money.
EDIT : Contrarians out here taking statements as challenges instead of thinking on the first word I posted. :
WHY.
What is the motivation? "because they want fast money and don't want to compete" is not enough of a motive, since suing the shit out of someone like valve will have big consequences and costs, and will need a solid reasoning as to the reason and the way (how) they are going to do it.