Not "marketing points" — I extensively quoted the actual DigitalFoundry take on it — which is
- choice of OLED/LCD is not about price, so much as it is technical trade offs
- Valve targets unusually low persistence, heavy focus on this for motion clarify and comfort
- to get these levels of microsecond persistence, OLED tech just "isn't there yet"
- why? Because of its inherent hold-based rendering, and you can't fix that with extremely fast backlight toggle as you can on LCD;
- instead with OLED you'd have to insert a lot of black frames — not even every other but more like 20 per frame to get to this level
- doing that reduces the effective light dramatically, so with that and pancake lenses, you just can't can't reach the level needed with current OLED tech
- indeed this means worse contrast and black levels, but it's a distinct choice and perfectly in line with Valve's longstanding emphasis on motion clarity over other factors
Their analysis of it is perfectly accurate, and you just can't accept the idea that OLED isn't actually a silver bullet, and that its lovely advantages in contrast are not totalizing.
I think it's totally reasonable to disagree with Valve's choice and where they drew the line on different aspects. But to claim it can only be LCD due to their cheapness, or that OLED is better in all aspects, is factually wrong.