I'm not exactly sure what you are getting at here. Are you suggesting that those banks which own the shares of the federal reserve don't actually own anything?
In that same post "Profits coming through the privileged money creation process mainly occurs at the member bank level of operation, and those profits are not turned over to the Treasury." That seems to differ with (from here): Federal Reserve Banks are not, however, operated for a profit, and each year they return to the U.S. Treasury all earnings in excess of Federal Reserve operating and other expenses.
I don't see how that differs except the Fed is failing to mention the profit of member banks.
They own a bond which pays 6% per year.
I don't see how that differs except the Fed is failing to mention the profit of member banks.
Why would they? If you need to know the earnings, many excellent annual reports are available.