I'll agree with "foolish" or "questionable decision making", but not "money grubbing". Wanting to keep all the $$$$ for themselves is pretty much a modern business mindset. Valve's no different -- Valve just realized that they could make extra mounds of $$$$ by being a distributor.
EDIT: Actually, since Valve is a private corporation, they have every reason to play more nicely with others and be less money grubbing. So I guess rather than "modern business mindset" I should say "modern Wall Street mindset".