Pg 7 - "Sooner or later you may wish to cover the goods spaces to
increase your income. (By doing so, you forfeit the bonus.)"
Making it sound like you need to cover the bonus spots to increase your income.
I've been playing it as if they are 'covered' as described on page 11.
The "bonus of 1 mead" example picture on page 7 agrees with you. That layout would be impossible if the mead needed to be covered, since the income to the right is covered.