The indiscretion is reported by variety and follows a similar relationship of the information, but it provides wider scissors on the offered figure (between 7 and 10 billion dollars. ) It seems because we still do not know where the negotiations are: the information emphasizes that the state of amazon negotiations with mgm is not clear and it is possible that you do not arrive at any agreement. Variety instead is more optimistic underlining that the $9 billion was the figure that mgm hoped to get.
To clear the field from doubts you will have to wait for the possible officialization. From this point of view, disney did school with the acquisitions of lucasfilm, marvel studios and fox that gave life to disney+.