<<Did the French have a million boat people leave France in 47?>>
Could you ever find a million people crazy enough to leave France?
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My French friends tell me that what a collaborator did if he feared for his life in European France was to flee to African France, notably Algeria. It was started as a place where Napoleon III could send his leftists, but it was an ideal place to get lost in. There was pretty much free land and ample employment for any educated Frenchman there, and not much chance that the Résistence would be able to find you. There were also a whole bunch of colonies in Africa, Indochina and the (aaah) South Pacific. And for the truly desperate, Guaine. Not to mention Guadaloupe, Martinique and Saint-Martin.
I have no idea how many collaborators headed for the Algerie or the colonies, but was an option and it was done.