From the Eiffel Tower’s web site (apparently everything has a web site now) FAQ:
"Are you allowed to publish photos of the Eiffel Tower?
The views from the Eiffel Tower are rights-free. Permission and rights must be obtained from the “Société d’Exploitation de la tour Eiffel” (the Operating Company, or SETE) for the publication of photos of the illuminated Eiffel Tower."
Publication in that case may specifically mean for profit publication, but it’s hard to be sure.