Another option, specifically for tech companies, is to create free products and use support contracts as a revenue generator. Companies that follow this model include Red Hat and Elastic. They've both been tremendously successful while adding a lot of good to the world. The open source community keeps them honest.

I'm not sure I buy that. The idea behind a public company is (in theory) much more democratic than a closely held company, and it used to be that public companies were viewed and regulated that way. But, when the vast majority of shares are held by a few, and when regulatory authority has been decimated, it loses any sense of democratic responsibility. We kinda have the worst of both worlds.