[mumblemumble]

I doubt it's a turn-off for corporate buyers in the large, but it's absolutely a turn-off for dev teams within corporations. Especially nowadays in an increasingly Agile world where everything is due 2 weeks from when you start work on it.

A developer might be quite willing to go to their manager with, "Hey, can we buy X? It will cost $Y, and save us $Z worth of time." But "Call for a quote" is a quagmire: They can't (and don't want to) negotiate prices themselves, and they also don't want to annoy their boss by causing them to spend the next 3 months being hounded by sales people.