I don't think it will affect the numbers that greatly anyways, I mean a great deal of football fans idolise players who are not of there ilk, those being the gloryhunter suppporters i speak of.
I don't think it will push people away from the sport, but if the French rugby team continue doing well, and the football team failing, there might be a shift of media attention which in turn would affect numbers oif players
At the end of the day, anyway in which this affects the sports, the results will only be felt in a decade or so.