In the Netherlands the only Maoist group is about ten people big. The Belgian PvdA is one of largest Maoist parties in Europe (around 3000 members), but also steadily moving to the right, becoming increasingly more reformist and are following the Dutch SP as their lead example (a post-Maoist opportunist, populist and rather nationalist leftwing party, but also a party which was somewhat of a pole of attraction until a few years ago with around 50 000 members at their highest point, now declining to about 48 000).
So, are they really so popular?