nah from what i read their prophet started out declaring 3 women to be the right legit amount and when getting older he increased the number. like the pervert that guy was, his followers now are.
If you fear that you shall not be able to deal justly with the orphans, Marry women of your choice, Two or three or four; but if you fear that you shall not be able to deal justly (with them), then only one, or (a captive) that your right hands possess, that will be more suitable, to prevent you from doing injustice.
— Qur'an, Sura 4 (An-Nisa), Ayah 3[1]
so you start out with 2, 3 or 4 and then proceed to have at least 9 wives.
How does this indicate that he changed it as he aged?
Reading through the page...
Noteworthy was the fact that it was customary for men to marry women without limit, a practice that ended with the advent of the Qur'an and its divine revelation.
So it increased as he aged but it was bigger before?