Making it more difficult for people to make money from wildlife body parts, is certainly a very good way of stopping hunting, or at least stopping trophy hunting.
The move has been made by the French government off the back of two things, the first is, the outrage which was caused over Cecil the Lions death, the other reason is, is that there is a new documentary out which highlights the cruelty of Lion trophy hunting, which is called 'Blood Lions'. The documentary highlights the truth behind trophy hunting, it brings to light the fact that the Lions killed are not wild Lions, but, they are in fact Lions which are breed in captivity specifically for the purpose of them being shot dead, and hunters profiting from the Lions dead body parts (trophies).
It is unclear yet whether or not 'Blood Lions' will have the same effect as 'Blackfish' has had recently. But, the signs are hopeful and encouraging with the French government taking this move, that 'Blood Lions' could be as successful in highlighting the cruelty of trophy hunting (and hunting in general), and therefore, it has the capability of damaging the trophy hurting industry where it needs to be damaged - monetarily, for trophy hunting to decline, or stop largely.
Hopefully banning Lion trophies is not the last step to stopping the injustices of trophy hunting.