To think about this from another angle, imagine yourself as a worker selling your labor in exchange for money. Would you voluntarily negotiate a pay cut just because you can charge a fraction of what you do and still swim in cash, or would you take as much your company is willing to pay you to work there? If your answer is no, then why should a company selling a product act any differently?

If squarespace following free market 101 upsets you so much, maybe you should start a squarespace competitor and charge whatever you think is a fair price. If what you said is true then you should be able to undercut squarespace by a huge margin and still make a profit. Give it a try and tell us how it goes.

> Would you voluntarily negotiate a pay cut just because you can charge a fraction of what you do and still swim in cash

You're posing the question like there's an obvious answer, and that that answer is "no". In reality, all kinds of people do this all the time.