Not only France got such high paying offers. It really depends on the laws of the countries and the network/advertisers you work with.
There are also $30+ Pin/CC submits for Netherlands, Germany, UK, Norway and Austria for example.
The really high paying offers are usually not available to the public and require manual approval of the advertisers.
I think France is a little less strict with the laws, but I heard that this will change now and the high paying French offers will disappear for the public.
Cpagrip already started to remove the public access to the $30+ FR submits and now requires manual approval to check if your traffic is clean and legal.