Selling the rights to the photos is quite literally consenting to any commercial usage of the photos up to and including publishing unless you license the photos under limitation clauses.
That's why you'd sell the rights in the first place. So that the photos can be used for business or advertisement purposes.
Unless you want to go down the route of calling Ms. Monroe too stupid to know what selling the rights to the photos actually meant. Which given the era; not an impossibility.
It honestly reads like an Onion article.
The article said it was done legally. The article questioned the morality of it. Legality and morality don't always go hand in hand.