[dbspin]

That's factually wrong - extrinsic demands decrease intrinsic motivation. There's a tonne of research on this. Similarly negative conditioning is less effective than positive.

[WalterBright]

> That's factually wrong

I don't buy that. Are you going to buy guitar lessons and then not show up?

Have you ever noticed how public school students trashed their textbooks that they were handed for free?

People don't value things they get for free. It's human nature.