Is employee ownership (EO) essentially giving away the business to employees for free, rather than owners keeping all future cashflows?

No. Selling a business, even to an outside buyer, means giving up some claim on future cash flow. Employee ownership allows you to receive fair market value for your business while transitioning ownership to your employees. This can also free you from the daily operations of the company. EO structures often offer flexibility in how much cash you receive upfront versus as ongoing payments.