Are there any other microeconomic concepts outside of zero marginal cost of replication

and scale economies that are important for people to understand?

Price discrimination is an important thing to understand.

What it means is that you can charge people different things based on their propensity to pay.

Now, you're not allowed to charge different people different things just because you don't like them.

You have to offer them a little something extra, but it has to be something that rich people care about.

Business class seats will routinely cost five or ten times what an economy class seat does,

but it probably costs the airline just two, maybe three X to provide that.

It's just the rich person is more willing to pay, so you have to give them the little things

that they need extra to either signal their rich or that little bit of comfort that they want.

Price discrimination gets used a lot in enterprise software where you have a freemium product.

The free version will do almost everything, but then if you want the version that's a little extra secure

or hosted on your site or has multi-user administration, so the IT person can monitor everything

that's going on, you're suddenly find yourself paying ten, hundred, or infinite times as much as you

go from a free product to a price product.