The carousel made the case: income measures the value the market receives, whatever the effort behind it, and most underpaid offers come from two miscalibrations. This is the longer version.
Income measures value
Income is the market's measurement of value received. The value you intended, the effort you spent, the hours you logged: none of that enters the measurement. The market never sees your 60-hour week. It sees what landed on its side of the exchange. Effort feels like it should count, but the market doesn't care about it. Effort only counts when it produces value the customer actually receives; effort that doesn't turn into that is, to the market, invisible.
So when income is below where you want it, the reflex is to work harder, and the actual fix is usually different. The gap is almost always in the value you deliver. The work is happening. It's just not landing as value the customer feels. "Work harder" sends you back to the same work at higher intensity. "Deliver more value" sends you to look at what the customer actually walks away with, and whether it's worth what you charge.
Be generous to be paid
Most founders are stingy with free content. The thinking goes: if I give away my best stuff, nobody pays. It's backwards. The more valuable your free content, the more believable your paid offer gets.
Trust is the limiting factor in most purchases, more than price, more than features. Free value answers the trust question with evidence; marketing answers it with a promise, and evidence converts. The bar is that your free content has to be something a professional in your field would normally charge for. A plan a trainer would bill for. A worksheet a consultant would bill for. If it couldn't survive being sold, it's just a teaser. Free content that clears the bar makes someone think, "if this is free, how good is the paid thing?"
The calibration gap
If your free content is that good, what makes the paid thing worth paying for? Paid goes further than free can reach: deeper, personal, direct. Free proves you can do it. Paid points it straight at the one person paying.
Two errors keep good offers underpaid. Most founders overrate the value they deliver; the offer feels like a nine to the person who built it, because they can see all the effort inside it, while the market takes it as a six, because all it sees is what landed. They also underrate what the market expects before it pays; a decent offer doesn't earn the sale, because the bar is set by every competitor and every free resource the prospect has already seen. Stack both and you get this: you think you're delivering a nine to a market paying for a six, when really it's a six landing in a market that expects an eight. That gap, between what you think you deliver and what the market expects, is where your growth is.
A way to run it
Stop asking whether you worked hard. Ask what the customer actually got and whether it's worth what you charged. Make one piece of free content good enough that a professional would charge for it. Then study what strong competitors and strong free resources have trained your market to expect, and close the distance.